How to go 24 Hours without complaining about a single thing.
It made me
Optimistic 
"Harder then i thought."
How I did it: Just didn't talk as much. I thought before i spoke too. "Do i really need to complain about this", "is it really that bad". I actually think i went for a whole weekend. Now i am back to complaining but not nearly as much. I see it as venting:)
Lessons & tips: The Serenity Prayer helps with this.
God grant me the serenity
To accept the things I cannot change;
Courage to change the things I can;
And wisdom to know the difference
When you realize you can't fix or change something you see thier is no point in complaining about it.
Resources: More positive friends are helpful. It's hard not complain when thats all your friends do.
