Just starting to chart your Basal Body Temperature (BBT)? Here is some basic information to get you started. For a lot more information, a great book to get is Taking Charge of Your Fertility by Toni Weschler. It is a wonderful resource, and many women refer to it as their "charting bible".
You should start with recording your temperature each morning, first thing, before you do anything else (don't even get out of bed). It should be taken at the same time every day, and after at least 3 consecutive hours of sleep. A digital thermometer is best... many women swear by a BBT thermometer although they are a bit more expensive. You should record your temps on a chart either on paper, online, or both. Pregnancy.org has free software to do this. The first day of your period (af) is considered cycle day (cd) 1. If you are several days into your cycle now, you can still start charting by entering your data starting on the cycle day you’re on, and leaving the days before it blank.
Recording other signs such as cervical fluid and cervical position can also be helpful things to put on your chart. These can be a bit more tricky, but are important to do. There is information in the thread "Informative Links" which is an announcement at the top of this forum.
Basically, as your chart unfolds, you will be able to tell when your body is preparing to ovulate (O), and when you see a temp rise that stays up above the previous temps for at least three days, you will be able to confirm when you have O'd. It is important to know that O doesn't always happen on cd14 and that the temp rise only happens after O, so you need to be aware of other signs. You should have sex (BD) at least every other day around the time you're expecting O.
Charting sounds like a lot of work, but it is worth it, and you'll get the hang of it once you've done it for a bit. We're here to answer any questions you might have.
(thanks Crystal.N for writing this up for us!)