According to research Wiki is:
A commandment. It can also refer to any Jewish religious obligation, or more generally to any good deed.
It is the December theme for NaBloPoMo... thought I should at least give one post about it!
I belong to my local freecycle yahoo group. Once a woman was asking for yarn and since i have more than my share I offered some of the stash up.... We have a splinter group off the yahoo group and someone was requesting yarn for her grandma who makes hats for the homeless... natch... there's plenty to go round, so again i offered it up. It turns out it is the same lady :-)
The karma was returned... when she picked up the yarn she left me three delightful homemade soaps, 2 snowmen and a Christmas tree..... and they smell good enough to eat LOL....
At any rate she belongs to a group of women who get together on Saturdays to craft for charity... She said she'd invite me to join. I'd love that! So all that good doing could result in more.. which really rocks!
so go out and do your own mitzvah!