"Meaningful", by itself, doesn't mean anything, because meaning is entirely subjective. You will first have to identify what really makes you tick, grinds your

"Meaningful", by itself, doesn't mean anything, because meaning is entirely subjective. You will first have to identify what really makes you tick, grinds your gears, revs your engine, and whatever other mechanical analogies seem appropriate. This requires a lot of introspection. Look around you. What upsets you? What do you consider among the most pressing issues of our time? Once you've done that (think a timescale of weeks, not hours), start hunting for groups at home and abroad who are trying to rectify those things, and who are doing so in ways that you feel are effective. You can have a diverse set of concerns, which means that finding a relevant project is easier.