Ground work is the most essential part of a horse's training, and the basics are what will provide a horse with his foundation. I would say the Parelli games are a great start. I know for my horse, when I first got him, he wouldn't respect me at all. It took awhile for me to figure out why he kept being so pushy, and I realized he thought he was in charge and I was part of his herd. The "yo-yo game" I found to be the most benefical for getting him to respect space. I'm not exactly sure why it works, but he accepted me as alpha and hasn't been pushy since then.
As for other things, the porcipine game is a great start for leg work and also respect. When he's tied and you need him to move away, he'll need to understand the yeild to pressure. Push him all over, not just his sides, but his hips, neck, even his nose. Let him learn that moving away from pressure gets rid of the pressure.
Sack him out with everything you can think of. Plastic bags, tarps, even throw a saddle pad all over him and on his back. If he's two, you can lean on his back to get him used to having pressure on it.
And of course lunging. Its never to early to teach a horse to lung. It loses up his muscles and also gets him to respect you. You may not be able to ride him yet, but there are plenty of things you can to to have him respect you and also trust you.
~He knows when you're happy
~He knows when you're comfortable
~And he always knows when you have carrots.