Read Taking Charge of Your Fertility by Toni Weschler and check out FertilityFriend.com
for good pointers.
The basics: To chart basal body temp (BBT), take your temperature every morning, FIRST THING, before you even get out of bed, preferably at the same time every day. Keep track of your temp, and you'll see a pattern: starting the day after you ovulate and lasting until your next period starts, your temp will be higher (usually by about 0.5º). This will tell you FOR SURE whether you are actually ovulating, when you ovulate, whether your luteal phase (when your temp is higher) is too short.
To chart cervical mucus (CM), just check your discharge every day. Some women go in to get it, so to speak, while I just take note when I wipe. You'll have an abundance of CM, and it will be very stretchy (resembles egg whites) in the days leading up to ovulation, when you're most fertile.
at 9:24 PM on Apr. 16, 2011