oIL LEAK

I have a 97 cavalier with a oil leak and a power steering leak that is killing me. So i have replaced both p.s. lines,made sure all seals on pump are good,just for grins i will be replacing all seals on pump tomorrow,for the oil leak i have replaced oil pressure sending unit and made sure i didn't double gasket the oil filter,but i still have a drip of oil running down my filter,so my question is could i please get some help with this,i simply hate the fact that she is leaking.