As other posters have said...take the basic necessities of life, a few extra favorite items and ditch the rest.
I'd not worry about not selling something you might decide you'll want later. Put a few items in storage if you want but I'll bet you will never go back to get them. You can always add on rather than have to go out so fully loaded you have to dig like a gopher to get things out and put them back or find you've never used them at all. Fulltime life will be different...you most likely will find you don't need all the gadgets you used before and can be quite happy with much less.