While gifting something to your friends and family might be relatively easier, it's not all that difficult to gift something to a colleague. Remember, the trick is in knowing how close you are to him.
If you're good friends at work, you can take the liberty of gifting something that is funny, quirky, or informal. However, for someone you don't really know a lot, something formal would be just fine. Let's see our options.
Sometimes, writing material gets over the very day you buy it. Notepads, to-do lists, pens, etc., are never found when urgently needed. Depending on the occasion, you can gift something very expensive or something that will cost you next to nothing.
If you're gifting something simple, you can pick up anything from a calculator to a desk clock. If it's something expensive you fancy, you can gift your colleague a tablet. If it's a farewell gift, everyone can contribute towards it.
A stress ball is the best example. It's as cheap and very useful. If you want to give something to the entire office, say for Christmas, this is a great idea. A mini dart board can also work wonders, provided the management is fine with a little play. A music player is another great option.
You can make a small calendar too. Ask everyone to mark their birthdays with a small goodbye note. This way, every few days, your colleague will think of someone.