Sorry to hear you got hurt. I hope you are feeling better.
Some common sense rules.
1.) Don't cut fabric when tired.
2.) Don't cut too much fabric. 6 layers max.
3.) Make sure the blade is sharp.
4.) If you are sitting down, make a protector quilt to put on your lap to keep your legs free of danger. It don't have to be pretty, just a couple layers of fabric to keep that edge away from your skin.
5. ALWAYS cut away from yourself.
6. Watch your fingers, 1/4 inch (6mm) over the edge of your ruler can make you just a bit shorter on one digit.
7.) Put the rotary cutter down, make sure it's retracted. I like my offset handle Olfa 60mm. Let the handle go, the blade automatically retracts.
8.) There is no number 8.
9.) Wine and rotary cutters don't mix. Iron instead.
10.) Maybe if you can't stand for long periods of time, get a tall stool to lean/sit upon.
11.) If in doubt, refer to number 1.
tim (all ten fingers of him) in san jose