You can increase your member level by making contribution to this site which will lead to points increase ultimately increse your member level.
By reaching to some specific point limit your member level will increse. You should have 100 points for Silver level, 500 points for Gold level and 5000 points for Diamond level, in your account profile. By contributing to different sections like resources, forums, business directory, videos, pictures, etc., you can gain points.
So keep posting and get awarded.