remembering drugs

So I'm now taking a daily pill. Missing it is not good, but taking two is a really bad idea. Yesterday, I could not for the life of me remember if I had taken the damn thing or not. I'm pretty sure I didn't (might have something to do with why I slept 12 hours...), but the potential risks of taking two outweighed the semi-certainty of not having taken it yet. Not so good.

I've never taken a pill for an extended period of time before, only short courses of antibiotics and similar. My memory isn't that good in general, particularly not about daily type things that you sometimes remember yesterday's version of instead.

Any suggestions on how I could remember whether or not I've taken a pill on any given day? I've thought about moving the bottle, or something, but I figured I know enough other people on daily meds that some of you might have good advice.