For me, lots of water and no caffeine. Also magnesium works wonders and I notice a definite difference if I'm not taking it. And B12 injections; my levels were on the very low end of normal and I was so fatigued. It took about a month to pull out of the fatigue with weekly injections; I'm now getting them monthly. My folate was low, too, so I now take that by mouth and try to be better about veggies. Last, probiotics which aren't about energy but are needed to keep things at bay so energy isn't drained via symptoms.