What do you use ? and when do you use it ?? I've built a collection of ebooks that I'm looking to give away as return for people opt'ing into my list. At present I've just been using the form on the side bar, and by driving people directly to the page itself. http://moneymakingguide.org.uk/wordpress/store/free-ebook-giveaway/ I'm thinking of putting an Opt in Pop up on whatever the "entry page" is to try and entice more users. Just wondered, what are you experiences / thoughts on Opt in Pop Ups ? If you have / do you use them whats the best plugin you use ??