[Sylvanfan]

All you need for laminate is to place a layer of poly on the sub floor, and than you can use a foam underlay on top of that. Make sure you leave a bit of a gap at the walls so that the floor is allowed to float. Don't worry about the gap becase the baseboard will cover this up after it goes in place. Other than that I'd just reccomend making sure you paint the walls before you get the flooring done (in case it's not obvious). Just don't put tile directly on a concrete floor like my boss did because if the slab heaves on you, than it will crack the tiles.