I think this can be tougher than it seems because often you don't want to spend a lot per individual, so it seems easy to get something "small" like a candle or soaps or whatnot, but as mentioned ( and maybe I'm channeling KonMari here) I doubt anyone wants more "stuff" ( or whatnots!).
You do have to think about your budget because a gift card says right out there, you are worth $___ and may look chinchy for the mall, for example, whereas, and I say this as a not-coffee-drinker, for Starbucks you can give $10 and it's useful to a coffee fan.
Then I'm often paralyzed by whether to give everyone the same thing, or try to individualize.
My approach is usually something edible but healthy because it gets used up (can be hard and also not the cheapest because I end up doing something "gourmet" or specialty store), or a gift card to an inexpensive or specialty item restaurant ( coffee, pizza) and I also like alaskagirl's movie ticket thing because you basically work with the movie house for 2 tickets or equivalent.
See, I struggle with this also, for work team members, volunteers, church people.