Zombie I think the same about my DD, I think 'you must be knackered how do you have so much energy?!'
Sorry to hear about the rubbish nights again 
Long post alert!!!
I thought I'd write in some detail as a few people have been asking questions about PUPDCD.
So last night DD was up for 3 hours before she went to sleep...normally it's only 2 hours tops. But we bathed and fed her where she was falling asleep on the bottle. She drained 9oz then I quickly burped her and was able to put her straight down and walk out! She wasn't fast asleep when I put her down either. From bathing her to me walking out of the room it took 20 minutes!! 
She then woke 2 hours later and I PUPD after probably about 4 attempts.
2 hours later she woke for a feed and took 7oz, she was fairly easy to put down I think.
Then 2 hours later PUPD after a few attempts.
20 minutes later again PUPD.
An hour and 10 later she woke for a feed and took 7oz, back down easily.
2 hours 10 later at 4.20 she woke just chatting to herself, she seems to think this is the new time to get up! I picked her up to settle her and she was wide awake chatting so I put her down and I laid on the bed. After about 10 mins or so she started fussing so I picked her up and rocked until she was drowsy. Put her down, she cried, picked up and put down then she stayed down, this was at 4.40.
Then 5.10 she woke and was ready to get up, this is her usual time.
So in total she was up 6 times. It's usually 7 times so a slight improvement. But what was great about last night was how quickly she settled. Phase 1 of the PUPDCD method is that they have 20 mins of PUPD to settle before you leave the room regardless of if they're awake, crying etc. The longest she took to settle last night was 15 minutes. For the first night in weeks she didn't come in to our bed, and her period of being wide awake was much shorter.
At 2 am I found myself eating MandM's and sipping coffee!
I've just done it again with her first nap. I don't want to rock her to sleep for naps then not allow it at bedtime as she'll get mixed messages, so I'm sticking with it. She was up 2 hours then I took her up and it took 20 mins to get her to eventually sleep. It was my last attempt before walking out and she did it, she must have known. 
You're meant to have quite good success after 3 days, but I think this is probably once you've reached at least phase 2 where you leave them to cry for a few minutes. It never got to this stage last night. I don't know if it will improve the number of wake ups just by phase 1 of PUPD alone- hopefully. If not, after maybe 5 days I'll decrease the PUPD time to 17 minutes and keep reducing until she does wake less.
This is now the method I will always use to put her down as it has been a huge improvement on the time it takes to get her settled, plus she's learning that she can't fall asleep on me so hopefully will wake less over time as she'll think it's pointless.
Apologies about the long post. Fingers crossed for good nap days about round!