Lori and Krista, there is no obligation to do anything if you join www.goodreads.com.
About the only thing I do is go on everyday for a few minutes just to see what giveaways are ending soon and enter the ones I want. And check to see if I have won any that I have entered. There are a lot of other things you can do but, I seldom fool with any of it. Going for real this time.