I don't have spasms so I don't know how to deal with them. I have a quad friend who uses Velcro on the bottom of his shoes and foot rest. I don't know how this would work for bad spasms.
For Me:
Keep a FeatherLite Reacher handy in my van, desk...
Installed the fold down/up luggage carriers on my TiLite ZRa (Must have, comes in handy for so many things, from carrying a guitar to a foot rest when playing it.)
Bungee cords come in handy for securing items on the luggage carriers.
Great funny moments in the chair episode: Had my guitar tied to my legs and resting on the luggage carriers once. Came up on a hole in the walkway at the base of a ramp, went to do a wheelie over the small hole. Didn't compensate for the extra weight, found myself on my hands and knees sitting on my guitar case still tied to it and my wheelchair somewhere off behind me... lol...
Plan and think ahead in most every adventure.
Day beds come in handy due to the back rest provides a good place to grab for sitting up, rolling over, getting dressed...
QUOTE (Hikkakaru @ Jul 23 2009, 05:50 PM)

I made a wheelchair accessible corner desk with L brackets and a cheap hollow door. You can even use the door knob hole as a wire bung for wire-management in the back of the desk.
I like that idea.
Simple, cheap and easy access with no worries about desk legs getting in the way.