I routinely visit blogs and when there's a contest for a book that I like, I'll enter. I visit so many blogs each week and enter to win a lot of books and sometimes win them. But I'm starting to see an irritating trend on some blogs, not all but some.
Instead of just saying, leave a comment and your email address for a chance to win this or that...they ask you to practically jump through hoops in order to get "More entries".
I've seen things like, asking people to follow their blog, friend them on face book, post a link on their own blog back to the contest (which I don't find so irritating), follow them on twitter, visit other blogs and do all these things for them too and let's not forget that sometimes they make you do each of these things in a seperate post! for those extra entries.
If you go to the trouble of having a contest and then ask people to follow you, like you on FB...ect...it really makes your blog look pathetic...in my opinion. If someone wants to follow you, they will. If someone wants to be your friend on FB...they will...don't make these things a requirement in order to get a book, gift card, ect. it makes you look bad.