I don't work as a professional reader but I work at home as a freelance web developer/graphic designer. Pomodoro is one such thing you can use to manage your time... but a lot of it is habits, rituals, life management skills and obviously discipline.
I use Toggl for monitoring my time on a desktop app and it tracks what I'm doing on my computer (including procrastinating) so I find that that can help with creating a sense of accountability in your methods.
Other suggestions: Dress like a professional, even put on make up, even if just at home by yourself. Establish morning rituals. Establish an exercise schedule like walking for an hour or so daily out in the open air always clears my mind and helps to heal my focus. Keep a solid sleep schedule. If you have any health issues, make sure that you are being properly treated and that you try to take your pills at the same time. Certain medications don't like being taken at the different times each day... even things like vitamins may need to be separated... especially things like sleep medications or sleep aids, this is an issue. Sleep at the same time daily if you can.
Truthfully, it's discipline. You need to set boundaries in your home, in your space, on your computer and in your own mind that encourages certain behaviorial patterns. Dress, talk and act like a professional. Perhaps decorate your office using certain colors and use particular scents of incense when you start working (this is what I do). Being in touch with those who share your field is very important too, as it is very isolating to work a field and not have connection with those who also do the same type of work... so make a phone call (preferably) over email. Try to meet in person with other people who work your field. Find a local guild or group. Meetup.com is an option.
Sometimes the mind is too active and if you're sitting at the computer a lot, you need a little bit of background noise or something to keep the focus. I have downloaded an app for my computer that makes typewriter noises and it helps to build focus when I am writing code. I also listen to news, music, and will occasionally take intellectual breaks... like go somewhere and post some writing or I'll take a Twitter break.
Anyway, don't make it miserable. Decorate your office, a place for everything and change your environment, your habits to reflect who you desire to be and how you want to portray yourself when dealing with others. After all, you are the primary product... the reader. So take care of yourself too... EAT RIGHT. Eat consistently. Don't skip meals because you're being too productive. Establish a pattern of breaks. Make sure you move and get at least 30 minutes of cardio (like walking)!!! (This gets rid of a lot of the restlessness). Last thing you need to do is feel like a shut-in. Buy a pair of noise cancelling headphones if you have to if your home has other people in it to establish "space" in your head.
Eating has a lot to do too with moods. Drink lots of fluids (real water, not soda). I carry a water bottle with me on errands. If you're on a high sugar diet, this can add significantly to mental lethargy. If you're binge-ing on coffee to stay awake or focused, switch to water and b-50/b-100 pills. These are B vitamins essential for energy (b-50 is base but b-100 is more of the same vitamins pretty much). My PCP recommended them to me, and I find that I don't really need caffeine to function to a high level anymore with proper supplementation. My multi-vitamin includes it now, but if you take it separately you maybe need it for a few days and can quit until you're deficient again (it's not necessary everyday at all if you eat right). Add more magnesium to your diet. Magnesium malate supplements also helps with anxiety and nervous energy if you have that issue and it also prevents muscle spasms for sitting in the same spot for too long of a period. I use Magnesium spray for this in place of medication which works wonders for muscle spasms and back pain. I used to need anti-spasmadic medication but quit this outright with magnesium supplement, the spray and making sure my nutrition is top notch. Chocolate cravings are a big sign you are mag deficient. If you are still craving sweets, get more fruits (natural sugars), antioxidants, etc in your system... my favorite are blueberries and I leave them in the fridge and snack a little bit at a time. Protein bars (and drinking protein in general) are GREAT for a meal replacement if in a time crunch, but be careful as they do tend to make them with a lot of sugar. You can make them on your own fairly easily though, but they make you feel full and they help with craving reduction. Protein is good for this in general... like eating steak meats, etc
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If you eat garbage and don't take care of yourself, you can expect that eventually it will kick your butt. The problem with being at home, everything is within reach. This means every snack and junkfood in the house. You may need to get rid of soda and limit what you keep around. If you can, make a bento box at home and prepare meals days in advance. My husband cooks his chicken on the grill weekly and will make meals with rice and vegetables that he takes with him daily as he rarely sits down at work and he works a very physical job as a detention officer in mental health. It is very common to overwork yourself when working at home, so yes... take breaks. This can lead to longer than expected gaps of procrastination as you spend your time in a thought bubble trying to get your body and mind back on track...
There's a site called creativelive.com I will sometimes watch when I am working. It's targeted towards entrepreneurial women (mostly creatives), but they have a lot of free courses (their schedule changes daily) that you can watch on repeat until the course goes back pay and they'll often talk about overcoming these obstacles... but sometimes just nice for me to have on another screen or on my tablet when working and the "focus" that these classes encourage inadvertently help me with my own work. Even if I am not following along with the instructor, I learn a new skill
and I keep my mind from driving itself crazy...
I keep a written calendar too. I find that jotting down what I did that day, no matter how mundane, helps to reinforce my perspective and progress in life... and also helpful for doctors visits and when tax time rolls around to have my work expenses so I know where to find an expense/trip...
Edit: Oh and if you have issues with meal planning (as I do) due to finnicky GI issues... take a probiotic... they not only help you from getting sick, but they help to improve a lot of things. Many of us should be taking probiotics when on antibiotics, so it's common for there to be some imbalance sometimes... it can help with reducing cravings substantially as your digestion will be much better. This means less breaks, less distractions (from your body) and much more time and energy to focus on what you need to. Anyway, taking care of your body is so important as it you are now the place of business...