The thing that some people don't realise when looking to create information products is the absolute necessity to be very targeted in what you provide.
An all over the place general information product on the basics of many topics is always going to appeal to plenty of people in your chosen niche, but it isn't always going to be outstanding on one topic. What I think is much more beneficial for you in your product creation is to focus on one specific topic and really provide for your readers.
Doing this allows you to really target your product to a certain area of your market, and helps you to identify a problem that you can solve in that market which people are ready and willing to pay for. This in turn leads to your subscribers from each product to be paying customers which are proven to spend money on that problem which you are solving or helping them with.
I would much rather have 3 different lists of paying customers from each section of my target market than I would have one big list of general subscribers who have exchanged their information for a very general information product that covers many angles but doesn't really focus on helping them with one single problem. Realising this will help you to establish who wants what and how they want it which leads in turn to you knowing how to serve your subscribers and have much more responsive lists.
Creating products that target a specific problem do take a little more work than a general product, but the benefits you will get from that extra effort are phenomenal.
Jamie Holt is a full time internet marketer and entrepreneur and author of the how to guide for affiliate marketing - Affiliate Xtreme, You can find it for free at: http://www.reviewtime.info
And don't forget to check out his daily drop guidance tips over at: Affiliate Marketing Help