I've been thinking the same thing over the last few years. Going to bed at 1AM every day used to be no big deal, but that's not the case now that I'm closer to 40 than 30. To combat this, I'm working on new routines - sleep by 11-12PM, alternating going to the gym and cycling to work daily and eating better (I have a serious sweet tooth). It's too early to see any results yet, but I believe it's going to make a major difference in the quality of life & work.

As another point of reference about sleep apnea, my mom got a CPAP machine in last couple years and reports amazing changes from using it. The sleep studies were a pain, but well worth the effort.