Why do I do this to myself???

It seems like the goal of going to bed by 11pm is a goal that is impossible for me.  Every morning that I get up feeling so beyond exhausted I say "tonight is bed early".  But oh no I must get busy doing something from cleaning to surfing the internet.  You'd think with 2 little boys I would be ready to drop into bed early but as soon as they are down for the night my body gets a second wind and I'm wired.  Tonight for example I was awake to feed my baby at 6am and couldn't really get back to sleep, I was up at 7:30 and feeling fine for most of the day then at 4pm I started to feel so tired.  I got the boys home and in bed by 9:30 and thought "one glass of tea" but then I started doing things and ended up here!!  I think I'm going to try and go to bed now...maybe in bed by midnight is a better goal.  I guess it's better then 1 or 2am!