This site has Blueprints for all sorts of things; cars, trucks, motorcycles, modern planes, ww2 planes, tanks, ships, weapons, trains, star wars, star trek, humans, etc. http://www.the-blueprints.com/
Wow thanks Prophecies for this,really nice references to start modeling:() Do you know any good sites from Star wars creatures references? Think it will be good practice organic modeling from start wars creatures.