Download the script on the CG Arts tutorial blog called OA Relax Verts and start using it on some of the verts that are very close to other ones. For example in the lower chest, in the thighs etc. You should have an even distribution of the faces. They should all try to be equal in size to their surrounding ones, and they should be as square as possible. OA Relax Verts script is like average vertices only it maintains shape, just don't use it on border vertices.
Thanks! I've downloaded it now :]