The Prophet used to offer night prayers till his feet became swollen. Somebody said, to him, "Allah has forgiven you, your faults of the past and those to follow." On that, he said, "Shouldn't I be a thankful slave of Allah?"
Unfortunately I have totally screwed up my body clock - I'm staying up too late and getting up waaaaaaaay to late - and so for the past few nights I haven't prayed Taraweeh (I like to pray it in the morning before fajr and suhoor - I concentrate better, plus it's the best time of the night).
Inshallah I'm hoping to change that now - I've signed up for Ramadan reminders and I'm hoping they'll make a difference. The last ten days are coming up and I really need to get my backside in gear to make the most of it.