Hi, I have been selling math videos on my website and on ebay for a number of years now. I have videos from arithmetic through calculus 3 as well as Linear Algebra, Probability Theory and Differential Equations. I also have videos for many standardized exams (SAT, ACT, GRE, GMAT, ...). I was making at least $500/week initially and then times got bad and and now I make about $200 weekly from video sales. I have a number of videos on youtube. I was wondering if you nice folks could give me some ideas on how to improve my business. Thanks!