I'm on the "late night cycle" again it seems..
since becoming unemployed, every few months I start going to bed later and later until I'm going to bed at 8am and sleeping until 4 or 5 at night..
eventually I just force myself stop up all day and then tend to crash out at about 8 or 9 pm and get up next day at 5am ish..
I'm not entirely convinced it's not some form of depression....
I really do recommend that you force yourself into a routine, even though you don't have to get up and go to work. Set the radio alarm for 7:30 (say), get up and make a cup of tea, go for a walk, wash, shave, put on clean clothes even if no-one else makes you do it.