I recently participated in a 7-day gratitude challenge.  A friend of mine nominated me, and the directions were quite simple.  I had to post 3 things a day, for seven days, for which I was grateful.  I also was required to nominate at least 3 other people to follow suit and participate as well.  I figured this was one of those challenges that would be easy, seeing as in my opinion I am and have always been an extremely grateful person.