If you must change your behavior to accomodate your patterns of meeting, do so slowly.

It is abrupt changes in behavior that will usually trigger suspicion.  Don't suddenly work late one night if that is unusual.  Build up to it.  You might even make it a habit to work late some nights when you are not meeting to keep the ruse plausible.

If you can, it's even better to make these changes before you begin using them in your affair.  Don't start an exercise regimen after you meet someone, have that in place.

You must appear as if your life is proceeding without changes.

Any suggestions for doing this?

That is our problem!  While I dont have trouble with time restraints, his is all marital and family time.  

Any suggestions for carving out time for redezvous

R