When I was a girl we had DIAL phones.
I am in a chair, use of only 1 hand:
1. reacher/grabbers in every room
2. Scissors to cut food.
3. Cabinet no-slide stuff (Rubbermaid- comes in rolls) or car dashboard mats that keep things from sliding for writing (holds the paper or check in place while I sign or write.
$. Under upper cabinets a U-Screw, opens jars, bottles easily with use of one hand.