My father uses a "companion chair" (a wheel chair with four small
wheels) in the house. We have the microwave on a small counter near the
sink. When the directions on the meals say "pull back cover, stir and
continue heating", he had no place to put the meal while he stirred (the
sink and the other cabinets were too high). I bought a medium height bar
stool and placed it under the counter with the microwave. It is just the
right size and height for supporting the meal while he "stirs". I have
since bought another stool for another spot where he needed a small
table. The stools are very sturdy, small enough and light enough for him
to move as necessary, and cheaper than an actual small table would have
been.

The other hint is about non-skid matting to place under things. You've
probably seen the rolls of woven rubber matting for use on shelves and
in drawers. I use them around the computer. I cut small pieces to place
under the keyboard and the mouse pad to keep them in place. I also use
pieces under computer speakers, CD 'spinner' racks, telephones, etc. to
keep them in place too. You can also buy larger (and slightly thicker
versions) which are made for use in a work shop to use in tool boxes to
keep the tools from moving while opening and closing the drawers or to
protect wood projects and to keep them in place while you work. The shop
versions are 3 feet by 6 feet (or larger) and are good to keep a
mattress from sliding on a hospital bed (the mattress always moves when
you raise or lower the head or foot) and to keep a seat cushion from
sliding on a wheel chair, since most cushions have a coated nylon
bottom. The rubber mats work best when the items somewhat heavy.

I have also used sticky backed velcro strips under keyboards Adhere the
strips along the front edge of the keyboard and perpendicular to the
front edge of the keyboard drawer so that keyboard is approximately
where you want it with the middles of the strips in contact. That way
you have a fairly large area of adjustment. I also use velcro under
small clocks and other small items which have a tendency to walk off the
edge of the desk. The velcro works well when the item is to light to get
any friction with the non-skid mats.

Hope these ideas help...
Norman