Ways to stay energized all day?!

Ways to stay energized all day?

Hi,
I work at my horse barn 8am-6pm, every day except for saturday.

At about 12-2pm(the hotteset part of the day) I find I am tired and dont have energy.

By about 4, I have my energy back, like I get a second wind.

I go to bed at night at 9-10 pm and wake up at 6 or 6:30 am.

I was wondering if their was anyway to stay energized and alert throughout the day, as horses are a busines you have to be alert in.

Thanks Everyone!

Drink Gatorade, and try special K snack bars to energize...they contain lots of protein!