Leave as many options open for the future for yourself or a future owner. Document on hard copy or disc what you do, for yourself or resale. (I'm way behind on my wiring diagrams - but it's still all exposed).
Do NOTHING to minimum code - go well over. If - for example, code calls for an outlet every 12 feet, go 8 or less.
In my shop/garage, I went for a double outlet box every 8 feet, each outlet per box being on a different circuit, 6 boxes per circuit (I'm not going to be using them all at the same time, but by damn, I want to be able to use several electrical appliances at once from a near-distance location without blowing circuits). I also put them on a handy 4' high location - good for shops, maybe not so good for residential for obvous reasons both ways..
