If you know his habit you can work around it. One trick is to tell him a time that is 1 1/2 hours earlier then it needs to be. Another is if you know that he is going to be out late or working the night before and he says something like 1:30 no later, in a kind tone tell him that it would be better if you got together later so that he can get more sleep then add the hour and a half to that in your own planning. It sucks that some people are so inconsiderate but it is a fact that some people have no concept of time management it just doesn't seem to enter their heads. Trying to change them is next to impossible and will cause more grief then it is worth. My husband seems to attract these slow to get ready friends. Over the years we have learned just to relax and go with the flow. We have also learned not to rush to get to their houses on time because that only means a longer wait.
I wish you luck,
Zen<font color=blue>

"Knowledge comes, but wisdom lingers."--Tennyson