Answers or join some forums in your niche mailing list area and make a note of the questions which are asked most frequently. Your products does not have to be anything amazing. I'm not suggesting that you write a full-length book all produce a mailing list huge series of videos. Your lead magnetic can be quite short, it could be just one video or a short report. Although your lead magnetic does not have to be big in quantity, it does need to be big in quality.
Provide people who opt in to your e-mail list with a quality product and they will remember you as the person who provided them with mailing list great value and will be more responsive to your follow up e-mails with them. Here are some suggestions for getting yourself a lead magnet: Write a series of articles and then compile them into a short report which you can publish as a PDF file.
Make a video answering some of the common questions in your niche. Interview an expert in your niche and make it into a product. If you don't know any experts in your niche then you could even interview yourself and make it into a short mailing list report. This will help to increase your authority in your niche area. Use public domain content and compile it into a report. Purchase a private label rights (PLR) product which has give away rights. This could be an E-book or a software program, a graphics package or a short video course.