I've been playing with hardsurface polygon modelling for a while now but I realised i've not really put that much thought into what techniques and things I use. I just tend to experiment with different things and then choose whatever I feel works/looks best.

I was just wondering if there were any major do's and don'ts when it comes to this kind of modelling? I don't want to pick up any bad habits that could possibly damage any chances for jobs etc in the future.