1) Always be the better person. It may suck in the short term, but in the long run, you'll respect yourself and it's nice to know you acted respectfully, mindfully, and can be righteous about being a wonderful, civil, honorable person.
2) Trust your instincts. Don't be suspicious; rather, know your _______ (fill in the word - nemesis, enemy, former friend, assfuck who disrespected you and has no integrity whatsoever, etc.)
3) Don't obsess. Find positive outlets. Take the high ground. Don't focus on the thing holding you back. Find things that will cultivate positive feelings and surround the world with more love. The world needs more love.
God, grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference.