[ronb]

Change your diet. Cut back / drop most grains, and harder to digest foods (you don't know they're hard to digest because your body is working to break them down; but without them, less energy expended).

Look into Ayurvedic info for body type and modify your diet around those reccomendations. Cut out caffeine and white sugar.

Figure out what and when your natural sleep cycles are; including an afternoon nap if that works for your sleep cycle (ie 20 min - 1 hour+, means a lot less tiredness at night). Even though you have to be at your job you can do it.

Eat your biggest meal midday. Excercize in the early morning. Go to sleep a lot earlier, but get up a lot earlier too. No alcohol.

Check out books by John Doullaird (not spelled correctly) a sports physican who understands and uses ayurvedic system in an understandable way / palatable way to westerners.

Don't make less sleep a goal, and if you make some or all of the above changes, you will be more rested, more efficient, and pretty soon, much less sleep needed. That was one of the byproducts for me when i made some gradual but major lifestyle changes, suddenly had a lot more waking hours, and also am much more alert.

YMMV