Walking Art,
I agree with the opk's. It really is a simple way of tracking your fertility. If you have the lifestyle that supports temping (I don't so it just is a waste of time for me) then this is wonderful.
I would test from cd12 at the same time each day - 2pm is thought to be an optimal time. It can take a while to get the swing of opk's some people (me!) have some trouble getting a true positive. However, I think I have got it down pat now (after 12 months!). I know when I get a second line that the ovaries are starting to do their thing and I begin to get jiggy with it!

Try to have fun at the same time - I know we can get caught up in the mechanics of it but try to remember the love we feel for our partners and from that love a little baby will grow soon...