Hi, Bonny. I really need something like this now myself. Serendipity seeing your post!
I shall try Apollonia's ritual to change my way of thinking & feeling and my clinging nature.
I suddenly have to clear out and leave my flat in another town / county, 3 hours' drive away, and empty out all my stuff & memories from my dear home of 15 years, full of memories.

I wrote this ditty to say as a calming mantra, which might ring bells with you too, though it is childishly simple:
Hanging by my fingertips,
Holding tight with dread,
Afraid to leave the life I know,
To look down, or ahead ...
Clinging to my old ways
That never worked for me,
But it's so hard to loose my grip,
To set my spirit free ...
Clinging by my fingernails
Now cracking, splitting, raw ...
Suspended moment - I let go -
And fall ... and fly ... and soar.