I have read that the SMEP (sperm meets egg plan) works the best and is the most efficient. It states that on CD8, you start having sex every other day, so that the sperm adds up and that it is good quality sperm (mobility wise). On CD10, you start using OPK's every day. Upon a positive OPK, have sex 3 days in a row, then one time a day later. I tried to follow this last month, but again, Super Bowl Sunday was my positive OPK. So I had sex Monday morning, then got all confused if I should wait until Tuesday night (I had work early Tuesday morning and couldn't fit time for sex) or again Monday night. Going to try this method again this time, just hoping for no distractions. However, we have 2 birthdays that weekend, so hoping that does not throw us off.