First, don't act suspicious. Stick to your normal routines but find a couple of hours to play within those time slots from time to time (i.e. before heading home from work or "going to the gym").
Turn the text notification off of your home screen of your phone and give every girl a male name in your contacts or an alias similar to what
@MidtownCowboy333 said.
I don't use a burner phone personally but I use google voice app with a different number. Sometimes being caught with a second phone can be just as incriminating. Try to create boundaries so that your wife or SO doesn't have access to your phone.
Don't change communication habits while at home...if you are not usually on your phone in front of your wife...don't start doing it non-stop.
Hide your google voice app, Twitter and "client email" within your phone so that it's not glaring someone in the face if they open your phone right away....similar to what
@acheron72 stated.
Always take a shower after the session...don't use soap, so you don't smell too fresh after a long day of work.
Here's a few...