There's also the BBT charting method, but if your partner's not into having another one (yet!) he probably wouldnt be all that keen on having you take your temp every morning before you get out of bed!
You can also use this method (as well as charting your cervical fluid (CF) when avoiding conception, so you know your safe days for DTD.
So if you explain that to DH then he probably won't mind, and when it comes to the time you might be TTC you'll already have the hang of the charting and be off to a good start.

Good luck