I'd like to point out something helpful here because it seems that the majority of the comments in this thread are from people with a combination of any or all of the following:

a) In their 20's

b) Stay up late (because you can)

c) No kids

d) Not married

e) In general, less stresses and responsibilities in life

So here it is. Sleep, and the management of sleep is probably the most important thing you will ever have to tackle and manage in your life. As you get older (and I'll leave it up to you as far as the definition of "older") you will find it increasingly difficult to have good sleep for a wide variety of reasons, such as:

- Your kids, regardless of whether they are older or if babies or toddlers and their demands and schedule.

- Your spouse, their schedule and what responsibilities each of you have (especially relative to your kids)

- Your spouse and how they want you to spend your time (it is no longer all about you. - oh by the way once you have kids the deal changes with spouses many times lest you think the divorce rate comes from people who knew they shouldn't have gotten married).

- Health

- The fact that as you get older it becomes naturally harder to get good sleep.

My point is very simple. Start thinking now, before you get married, before you have kids, before you overextend yourself on the vacation home and other expenses (that you haven't even begun to think about) how your sleep will be impacted by those choices you make.

The good news is it can be done. But it takes effort to structure things before you go down a path that can't be reversed.