I need Energy!

It seems lately like I do not have enough energy to get things done.  Usually it’s not that I don’t have time it’s that I don’t feel like doing it.  This is my problem…I am very tired all the time.  I have tried various energy drinks, red bull, bawls, amp, etc and they really do not seems to keep me going.  You may think that it is because of what I eat, but I usually eat salads, steaks, chicken, pasta, etc.  A good mix of everything.  I may need for vitamins?  I’m really not sure, but it’s not good to feel like crap every day!  Does anyone know of any types of vitamins or drinks that can keep me going?  Let me know, thanks!