Three things
Here are 3
Pick one. Each takes about as long as it says.
Write up the process nobody has written up
Renewing a visa, appealing a decision, navigating a diagnosis. Somebody is about to do it with no map.
An afternoonFreeA stranger
Give a local group one evening
Small charities and clubs cannot afford the professional help they need, and the gap is usually one evening wide.
An afternoonFreeA stranger
Teach six people the thing you can do
Most useful skills are held by people who do not think of themselves as qualified to teach them.
An afternoonUnder $10A stranger