Try to avoid standing right next to, or on top of, your teammates. Stacking on top of each other makes it real easy for an enemy player to interrupt your capture attempt with a single AoE spell. If you're standing on the opposite side of the tower it will take at least two attacks to interrupt the cap (doesn't include them clicking on tower).

Just thought I'd share. I see this mistake made often in games.

Yeah, it's amazing how many people still do it. Also, find something better to do if two people are capping a point already. And check which direction your teammates are walking in before leaving spawn, so too many of you don't go the same way (during the whole game, not just initially).

Agreed. One small mistake or judgement in error can mean the difference between winning and losing. The Crystal Scar is not very forgiving on errors.

Edit: This got a downvote? O.o

+1. Add to this:

If you're the tank or have good disruption like Blitz or Alistar, move to the side of the tower closest to the enemy base so you can CC enemies that come to interrupt. If they have several roaming the jungle, this isn't as important, but the no stacking rule always applies.