Using a tripod and very good lighting is the key. Cheapes source of good light is the tripod work lites from walmart. Should have 2 500 w bulbs in it. Take spread them apart.
Thats how i did alot of mine, and then I go back and photoshop them alittle. Oh and another thing see if your camara can have a push button added to it. You can slightly move the camera even on a tripod without it.