Name three things about your life today that are good:
1. My wait at the Social Security office was not too long
2. I have been able to catch up on work reading
3. I am within my budget on Christmas present buying so far, and having a budget is making me less stressed about spending money.
So not crazy things like "I won the lottery today!" or "I was discovered as an actress today while walking across the street!" But ordinary things. Regular life things.
Keep note of such things. Make a habit every day of thinking of three good things and then thinking of why they might have occured. Filling the mind with more good things leaves less room for the bad.