It helps to do all those things, but like someone else said, even with prime timing and conditions, your chance is like 20 %. It just goes to show how special it all really is! I tried for 5 months, and used ov. strips for the 4th and 5th months, and took my temp for the 5th, and even those don't guarantee it. If you want to buy these things DON'T do it at a store! They are about 3 times the price! Go online and Google cheap pregnancy tests, and you will find bulk dip strips(you pee in a cup and dip it). Some have combo packs. I just purchased 20 ov. strips and 5 preg strips for 11$. AND, they are more sensitive than most store products. I used one 5 days before my period last time! I know so many people who have done it all (inc. in vitro,etc.) for years, only to stop trying and than get pregnant! Unfortunately, as frustrating as it is, you really need to look at it like you have no control, and expect it to be a year at least, then you will be pleasantly surprised! Good Luck!