I find with fatigue, it's important to find that thing which recharges you, and make a little bit of time for that every day. For hubby and I it's reading quietly. For others it might be connecting with a good friend or spending time in the garden. The important thing is to work out what actually makes you feel refreshed and energised, not just something you enjoy (there are plenty of things I enjoy that I know still wear me out). It sounds a bit wishy washy a first, but you'd be surprised the difference it can make.
Other than that, looking at what medicines you are on that might be contributing or seeing if you can improve your diet and get exercise (which helps with fatigue, counter-intuitive though it may be).