[snappo]

honestly exercising regularly will help your tilt more than anything (if you aren't already). get in the habit of running for 30 min or something every morning before you play and i guarantee you'll notice a difference.

also as other have said, being conscious of your thought process in a hand ("thinking out loud") helps keep your tilt in check and make sure you are making decisions for rational reasons. (ie not emotional). essentially you are forcing yourself to give a rational explanation for every decision you make which makes it a lot harder to make impulsive moves.