Yes, and keep an Appreciation Journal, so you don't forget any of those small things that you want to be grateful for.
Comparing is poverty
Gratitude is riches
When you make gratitude a habit, life also becomes more and more memorable. This is because you attract more and more good things and experiences which stick in your mind, and days don't tend to blend into one. That can happen when life isn't too good (same s**t different day etc) but just start being thankful for your life now, and things will start changing very quickly.