Stop before you start to feel ill and save some energy for getting better. Keep a diary of your symptoms to see how they fluctuate in relation to your activity levels. Remember that the after-effects of over exertion can be delayed by up to two days. Set yourself a programme of rest and activity periods throughout the day. Try to stick to this, remembering that rest periods mean lying in the dark in total quiet.
Activities can be mental or physical.
Physical activities include getting washed and dressed, so do not underestimate how much energy these use up. Mental activities include watching TV, reading or chatting on the phone, all of which can be as energy consuming as more physical exertions. Plan your week ahead as well as each day, making a note of what you want to achieve, then cross out the less important things. You can't do everything. When you have to do something really tiring, plan for this with extra rest periods scheduled in before and after the event.