Is the tooth fairy sometimes forgetful in your home? We find that ours sometimes flies right by accidentally. To correct this problem, we've put a ribbon (it reads "Lost Tooth") on the bedroom door so that when she flies by, she is more likely to notice. Well, still maybe not every time, but much better odds!
Or, put the tooth itself in a Tooth Fairy pillow and hang it from the door!
More: Hacks for the Tooth Fairy