How To Have an Active Lifestyle

It's been awhile since my last regular full exercised. I became too lazy to do it more often times now for some reason. Since then I now suffer body pain-- at my back, and legs. I thought about arthritis symptoms (God forbid!) but its not. You know how very important to be active, moving in a balance way of lifestyle makes our body away from the pain. This way I can be more productive and healthy. I should start now and continue to do this (so help me god.. :)*) forever.