I don't think there are 10 things I need to do to keep my man from cheating. I think there is one thing my man needs to do: NOT CHEAT.
And, should my man cheat, there is one thing I need to do: DUMP HIS ASS.
It's a much simpler system.
It's not really a black and white "if he cheats I dump his ass" situation for me, as I have known some people I really have a lot of respect for who have slipped up and I think I could forgive and forget if the circumstances were deserving. I do, however, stand by my statement that there are not 10 things I should do to keep my man from cheating. And if there were things I ought to do to keep my (again, hypothetical) man from cheating, it would not be limited to some stupid list of 10 arbitrary things featured in Cosmo along with their 100 ways to please your man.