Prioritise what tasks need to be done, and plan into your day and throughout your week. Do not try to get it all done at once.
Schedule more demanding tasks for the time of day which is best for you. Remember to pace yourself, resting after each stage of a task to manage increased breathlessness.
Some housework tasks are harder than others. Changing a duvet cover or making a bed can be heavy work. Get help or try doing this in stages rather than all at once.
Vacuuming can also be difficult because of the weight of the machine and the dust. If you are buying a new vacuum cleaner think about getting a light weight model.
Use a damp microfibre cloth when dusting. This will help to keep the dust from spreading in the air around you and getting into your lungs.
Sit down when you are ironing or washing up.
Avoid strong scented air fresheners or cleaning products.