Small doses, as with anything new. Wear 'em for an hour. For a week. Then wear 'em for 4 hours. For a week. Then wear 'em for 8 hours. For a week. Ya gotta grow into 'em, same as any other physiological change in your life. I have had contact lenses for 10 years now, and this is *exactly* how I started wearing 'em. Good luck!
Wear them every day. If you don't do this, you won't get used to them as fast as you want. It takes a while to get them into your eye at first, but the more you do it, the easier it gets. If you want to get used to them quickly, you have to get used to putting them in and taking them out. And the only way to do that, is to do it everyday. Everyone is different and everyone puts them in differently. It takes time - good luck.