Just some unwarranted advice, the energy thing can be changed with proper diet and exercise, I'm 35 and it's amazing what a difference eating paleo and exercising 3+ times a week has made.
I'm 33 (soon to be 34), and fitter than I ever was in my 20s, with more energy.
Difference? Eating differently (low carbs, high protein), and exercising 3 times a week.
I also stopped smoking a year ago.
Quality of sleep is also way up there now.
It all helps - really does. Just doesn't stop aging :-)