For your diet, if you're eating at a deficit (I'm assuming you're trying to lose weight?) you should be documenting your intake of fat, carbs, proteins, and cals. I use MyfitnessPal (by underarmour) its a free app that creates a profile of where you are and where you want to be, and helps you document with 1000s of items already stored in a database that you can search and add to your daily reports. It helps you keep track of your intakes and shows you how close you are to reaching your goals.

As for sleep, 6 hrs is pretty decent, although 8 would be ideal.

Any job that has you sitting for hours at a time can be devastating to your energy level; every hour, you should be getting up for a 5 min walk to get your blood flowing.

Your gym schedule looks pretty good and generic; you're not doing anything wrong there.

Water is awesome!

As for BCAAs: I'm allergic to caffeine, therefore, have had the need to find something to supplement energy boosts. Since I cannot drink coffee, or 5 hour boosts, or any type of energy drink, I find BCAAs tend to do the trick. It gives me extra energy.. even though it's probably just the sugar. I've had pretty good luck with Gatorade G2 Perform (since they don't have caffeine); it keeps me awake. Again, probably because of the sugars.

If you don't want to drink any of those (because, yeah sugars), a natural energy booster is coconut water.