You'll get so much more useful help if you're more specific. What are planning to paint? Bottom, topsides, deck, interior?
If you're planning to wax your topsides, I would suggest you check out marinehowto.com for what MaineSail has to say about waxing and prepping for waxing. You'll find a lot of information that pertains to compounding and polishing, and you can disregard all that for what you've asked. Just see what he has to say about cleaning the topsides and waxing.
So, let us know what it is you intend to paint.
In general, boats are a much different creature than a house with regard to how particular you need to be about your techniques and materials. That's probably why you're asking in advance. Something that seems to be true on boats is that the smallest mistake, or use of the wrong materials can bite your wallet extremely hard. Like using Windex on flexible vinyl windows.