To understand your fertility awareness you need just two things to Chart your BBT
There are two ways to record your temperature. You can use a paper chart (in which case you actually need a third item...a pen!) or electronically.
Now that you understand what your basal body temperature is and what you need to get started now we can move onto how to chart. Ready...
Ok. Take your temperature and write it down, or log it in. That's essentially it. The only thing that makes it different are the important factors to keeping it accurate. In your mind, make them your rules for charting. These rules are
Here's a picture of my chart when I got pregnant with my daughter
You need a basal body temperature thermometer because you need it to record to the second decimal point. If you notice my temps along the left side of the chart. The day before ovulation (the red cross lines) my temperature was 96.81 degrees and the day after was 97.46. Just a mere few hundredths of a degree but if i hadn't been using a sensitive enough thermometer I may have missed the "spike". The temperatures before and after ovulation aren't a huge difference numberwise but once plotted on the graph you can easily see the significance of the readings.
Now that you know the basics, get yourself a good Basal thermometer and start charting. Remember to get a good 4 hours of sleep and take your temperature the first thing you do.
Wish you the best of luck!