It can be tricky to place small stickers accurately on small parts using adult-sized hands. The best technique I've found so far is to remove the sticker and stick it on the corner of the sticker sheet so that I can position the sticker above the part without my fingers getting in the way. Still, though, it can be difficult to center the sticker perfectly, and when the margin between the sticker and the edge of the part is small, tiny inaccuracies are easily noticeable.
What are the most effective techniques for applying stickers accurately?