Being grateful for what we have (instead of focusing on what we don't have) is crucial to finding happiness. As you stated in your post, this is much easier said than done; however, I believe that shaping your outlook on life to be more appreciative is worth the effort. Coincidentally, my dorm is hosting a gratitude event over brunch this weekend, where students will write random thank you notes to their friends, co-workers, and loved ones. I am excited to attend, and I will be thinking about the message behind your post while I'm there. :)