I pinch off the first two pairs of leaves so that I am planting the plant about half of it's height in the ground. Roots form on the buried stem and the plant is better off in the long run. "Leggy" plants are one thing you are supposed to avoid when buying them and you have a choice.
Hardening them off like Quiver says should slow them down some. You don't need to put them anywhere special though, Just out in the day and in at night if they might freeze.
I think you get "leggy" plants when they don't get enough sun, if they have become leggy there isn't much you can do about it, they aren't going to get any more branches or leaves on the bottom part, the trunk, of the plant. Just get them out as soon as possible and pray for sun.