Weight training

I’m looking for resources on effective weight training for the purpose of physique building. It’s an area with a particularly poor signal to noise ratio so I would value pointers from other rationalists. The kinds of questions I would like to answer are:

  • How to structure work-outs. Should I lift as much weight as possible or do more repetitions at lower weights?

  • How should I trade off frequency of gym visits against length of those visits?

  • What supplements should I take?

Edit: I’m vegetarian, and I now realise this is rather important to answers to point three. So far the only supplement I’ve been taking is soy protein.