You're absolutely not bothering anyone! That's what these boards are for--help, support, and silliness.
I used FertilityFriend, which will give you a free VIP membership when you first sign up, but drops to basic after your first month. You can upgrade, though. Many women also use OvuSoft and really like it. You pay a one-time fee and it keeps track of everything, too. (Often, women will use them in conjunction just for peace of mind.)
BBT thermometers definitely work best, and like the other women said, temp at the same time every day, even on weekends, hopefully after 3 hours of sleep. Try to keep your sleeping conditions the same as much as possible--heating blankets, heaters, A/C, open windows, etc. all will affect your temp.
My temp always dropped right before O. Sometimes it shot up, others, crept. (The creeping is frustrating because you wonder if you DID O.) After a couple of cycles, though, you'll start to notice a pattern--or lack of one.
I used Answer OPKs from Wal-Mart and was very pleased. They come in a 7-pack, I think, for about $11. Not cheap, but I only used one per day, starting around CD 11. (This was after I had figured out about what day I might O.) For several cycles, I just didn't bother. I could tell that my body was gearing up to O and BD'd just to cover the bases.
Let us know what you choose and how you stock up!!! Good luck, of course! I found temping to be enormously fun...but I'm a dork!