Here are a few random thoughts from someone who is still trying to get it right.
If you have a decent camera, you already have way too muc camera. I can easily get 600 pixels wide from only a small portion of the photo. Since I don\'t focus well on the closeup, I don\'t even try to make the mini fill the frame.
A background is your friend, and your enemy. Sometimes the camera focuses on the background and not on the mini. Not sure of the bet solution other than to keep the two as close as possible to each other to minimize the problem.
Light is your friend and your enemy ... mostly your enemy. Too much light produces glare ... too little light produces darkness. Too much focused light causes glare and shadows ... I\'ve seen minis I taken where it looked like I missed large areas of paint ... no it\'s not the black primer showing through, it\'s an annoying shadow. I think diffused light is better than multiple non diffused light sources, but that\'s my next experiment.
Last thought, but it doesn\'t always work. Set your camera in time mode. Gives you a chance to step back from the tripod (Yes use a tripod) and not have movement blurr the image.
You know, when I was in college (many years ago) I used to take rainbow holograms of my minis. No worry about focus, backgrounds, light sources (assuming that the laser was working), just get up your vibration proof sand box, allign the mirrors, set the film raise the shutter (aka a dark cover in front of the beam) and pause while the film was exposed. Develop and enjoy.