I would say the general rule is 11-14 days for most women, but it does vary since everyone ovulates differently. I would use an online calendar and plug in your past menstrual dates to guage when you might ovulate. There are many free online calendars you can use to do this, just google it. I would also use the strips if you think you don't have any issues going on with infertility. They are easy and I have had great luck with them. You can get a 30 day supply from target for about 30 bucks. I wouldn't mess with all the other stuff unless you are having trouble otherwise. Keep it simple if you can! I think people fuss so much with charting, and temperature taking, and mucus checking when all you really have to do is keep track of when you ovulate every month by peeing on a stick, its so much easier!!!!! The other methods are great if you find no luck with the stick or your cycles are really irregular. I just found them to be terribly tedious and I have been trying to conceive for over a year. I finally used the sticks and I am now 9 weeks pregnant. You will know when you are pregnant by taking a test!! Keep some handy and when you miss your period is a good time to test. I tried the ept and tested 5 days early like the box says and I got a negative. I waited until one day passed my period due date and it was positive, you can get a three pack at any drug store. good luck!