natural ways to increase energy?!

I have completely cut out caffeine from my diet because i was starting to affect my sleeping and energy levels, But it's been a couple months and I find myself becoming very tired during mid-day. I don't like energy drinks or 5 hour energy or anything like that, but, I need to find something I can do/eat/drink to get through the day and stay focused. I work in an office so, theres no reason behind my sleepyness and I get my 7-8 hours of sleep a night. What can I do to get past that "2:30 feeling?" Thanks!