Great advice from China. I don't have chronic fatigue syndrome (though it's been mentioned) though have a lot of fatigue from other conditions and also used to be really active.
Pacing is very important. Know your limits. Planning is also important - I find it also helps me stop stressing about things so much, just making a note of what NEEDS to be done that day when gives me a sense of structure and priority. I also keep all my appointments and reminders in my phone so ti makes me feel more organised (especially with a woolly head).
I have a little control zone, where I can get to easily on the bus and I have my usual coffee haunt, mini supermarkets etc... round so I can get whatever I need without having to go further, but I can if I want and feel able.
I also challenge myself lightly, just go and have a gentle wander round somewhere where there are things to look at which distract me :) Swimming is also great, just gently moving when you feel more weightless.
I also break things up and allow a lot of time for rest and enjoyment. My work journey is split and I get a coffee and meet a friend part way, similarly coming home, I stop for a coffee between buses and if I can before getting to medical appointments etc...
My coffee place is very important to me and I've found some nice things to do there like meeting friends, knitting, taking a puzzle book, just gentle things which relax me and make it a nicer time out of the house but not sitting there dwelling or feeling fed up. I often feel after a bit of a rest that I'm more able or find it easier to go do my shopping etc...
Just getting out for a bit of fresh air can be great, as above or just a gentle wander into the park to sit on a bench and feed the ducks.
It can be hard but do give yourself a break, allow more time for things (less stressful and easier on your body). Relaxation can be good - something my Occupational Therapist has been working on with me, just ways of relaxing your body which is more restful - it's amazing how tense you can be without realising it, especially when you're finding things hard going or stressed because you can't do things.