I go for the regression approach for predictions. It serves me well since it carefully takes into consideration both dependent and independent variables. I studied this when I took my Master's Degree and it really changed my life. Everything is provided for already the moment you download the software in your laptops/desktops. All you have to do is to key in the data you have gathered. But you know, you have to have a thick data for it to better well work for you. Try it, and let me know how it goes for you.