My drafting group has a few hardcore players like me who have been playing magic for a while. We've memorized almost all the commons and uncommons in the sets we're drafting (usually Innistrad or 2012), know a lot about how to win at drafts, know the good archetypes, and have a bit more deck-building experience compared to some of the other people we'd like to add to the group. The new people know the mechanics of the game and have played enough to know how to build a decent deck, but I'm worried that the rest of us will have a significant advantage that takes away from everyone's fun.
What handicaps can be used when drafting that give a weaker player about an equal chance at winning while removing as little of the fun as possible? Obviously we'll coach them a bit about the techniques we've used that have been effective, but until they're completely up to speed I don't want them to be annihilated and quit. Should we give them a handicap during the actual draft, like an extra few picks from another booster after the draft is over, or a handicap during the actual games? What handicapping techniques have you used that work well?