Much like Hemera, when I first buy the crystal, I will bring them home and cleanse them. Anymore, my cleansing for crystals include putting them around my clear crystal mountain crystal that I have. I will hold them and talk to them as well--usually telepathically--thanking them for coming into my life and asking them to aid me in the way they are best able to.
Once in awhile I do like to hold them during my meditations and I also like to read all I can on the various crystals that I pick up. For the most part, the majority of my crystals are kept together in a box--so that I can easily travel with them. However, I also keep some on an "altar" that I have set up in each home. At the farmhouse, its very small, as its on the table beside my bed with my lamp, alarm clock and a few other items. At our vacation home, I have it set up on a vanity that I own--with the majority of my crystal balls and other crystals as well. I change them around at times too, tucking one that I feel pulled towards into my pockets as I go about my daily life.
I always wear my moldavite & pietersite on a chain around my neck. Some days, I feel I need my jet stones or my rose quartz with me as well and tuck them into my pockets.