I'll admit it, I like to play practical jokes. Not small things either. If you're going to do something, I think you should do it well or not at all. I once put 480 tubs of play-do in a co-workers cube for his 40th birthday. When I put up Christmas lights, I try to do 20,000 of them. I've won 'best lights in town' contests twice. I've filled cubicles with balloons, post its, and drink umbrellas. I try to think outside the box on these things.
I've been doing something for a while, I call it small surprises. Typically at work, and always anonymously. It could be a plate of cookies, or a slinky on the desk. Something odd, and it leaves the person smiling a bit. I don't do it for thanks, that's why I do it anonymously. The mystery of 'who did this' is enough thanks for me. It's called spreading kindness, and it works.
I pulled a really good one today. A coworker had her 18-year wedding anniversary today, and we are on the road in Minneapolis. With her husband's idea and consent, I booked her for a 3 hour spa session. Another coworker with us wrote a card "from her husband". Was it cheap? No, but I paid for it with poker winnings, so no cash out of "my pocket" was involved. Was the shock and surprise worth every penny? You bet. My boss wants to figure out a way to reimburse me, but I said no - that's not why I did it. I paid cash, and got no receipt.
So, the moral here is that sometimes you'll notice someone needs a pick-me-up, where something small can go a long way. If you're going to do something, do it well, and reap the reward a thousand times over.
