Help with a Pea Gravel Patio?

I am installing Pea Gravel (3/4 inch) in front of the house. It will not be used as a sitting area, just for entry path. I love the look and we live on a hill and I am sick of water laying in that area, the concrete was poured wrong and there is not enough drainage. What are your suggestions for a base before placing gravel. I want to put down landscaping material, but what should the next layer be Sand?? Also how deep should the gravel be? I need suggestions.