I love reading but found that I actually read very little last year. I am not sure what a good goal would be as I don't know how much reading time I have atm but I think 80 sounds like a good number. Not too hectic so it won't be impossible and not too small an amount that it won't be a challenge anymore. I will be adding a section to my side bar as soon as I found a counter thingy that I like to keep track of the amount and I will be adding a page to add the books to as I finish them.
Edited: The challenge has a fantastic button of their own to keep track of progress so I am using that.