A therapist told me she took a Positive Psychology course and they had an interesting assignment - it came to mind when I read your post.

The assignment was no complaining, no negative talk, no gossip. For 21 days, which is considered the number of days it takes to create a new habit.

Give it a try! Think positive.

Here's a visualization that I use sometimes: If negativity enters your mind, recognize it without judgment, feel it for a short time, and let it go. Let the negative thoughts or the complaining silently float away. You can picture a balloon or bubble with your complaint inside, floating away.