Almost everyday, I write in a journal. I will write about how I'm feeling, what we're doing as a family, goals I have, and the boys and their accomplishments.
At the end of the month I go through and write down all of our blessings that month, and WOW, how blessed we are! I've also recently started writing 5 things every few days that I'm thankful for. Anything from my family to my favorite song.
Going over your blessings and what you're thankful for is such a positive and healthy thing to do for yourself. One thing that can NEVER be bad for you!