Either "Boy, I'm glad I wasn't in Las Vegas that night" or "I'm glad I'm not in New Orleans for that storm" etc.
OR
It's a sunny day, I'm glad I have a job,
my car runs well, I glad I have a.c. In my residence, etc.
OR
I'll be happy when I get that Ford F250 truck
I can't wait till Friday and quitting time.
I'll be happy when I'm retired. Etc.
Read more: What should one say to themselves on a daily basis as a mantra, etc. In order to fell positive?