In reply to ericinbristol:
Some possibilities:
1. simul rap (but only if you really, really know what you are doing and use a buddy system).
2. don't rack the draws one-by-one onto the the harness, carry them in bunches of five: five long, five short. This saves a lot of clipping
3. lead in blocks: she leads 5 pitches, he leads 5; this keeps you in the zone.
4. belay off the anchor tree in guide mode and as this is almost hands-free you can untie and thread the rap point whilst bring up the second. (You will need to be attached to the anchor with a sling, not the rope.)
5. use a cleaning sling - a 60cm sling over you shoulder. Clean everything onto this then just hand it to the leader for her to re-rack.
6. eat and drink lots.
7. if a piece gets stuck, remove it on the rap.
8. use an overhand to join the rap ropes.
9. depending on your rules, allow the second to hang on the rope to remove pieces to to get over the crux.
10. Use a very uniform rack. i.e. all the cams follow a natural sequence from the minimum number of manufactures and no gaps. If possible, put cams on matching coloured krabs. Assuming you carry your wires on 3 krabs (small, medium, large) colour code the krabs (yellow, orange, red: the rule might be the more "red" the krab the bigger the wires). All this does it make it easier for two people to use the same rack without confusion.
11. do your own stuff first, don't try and share the work. Only you can tie into your harness or tighten your shoes. Get that done first, even if that means the other climber is pulling the ropes etc. more.
12. use twist lock krabs where it make sense.
13. use the krab on the piece as the first nut-key, only get the real one out if you need to.
14. tape your hands so you can jam fast and bash pieces without pain.
15. make sure you stay safe - it's only a game.
Hope that helps, and sorry if others had said the same things.