I'm the same way with housework! I find that doing things in small doses while resting in-between seems to help with the fatigue level. As far as cooking, getting some things like veggies pre-chopped can be a huge energy-saver. A friend introduced me to sliced mushrooms, which is great. I also use frozen stir-fry veggies. I find that doing the bulk of the prep work in the morning and storing things in the fridge for later seems to work well.
One thing that may help is to have an occupational therapist come and look at your space. I had one come through the local MS Society. They can observe you and how your getting around, how things are stored, etc. For example, I get very winded bending over to do things and the therapist suggested keeping items that I use frequently more at the level of between my hips and chest. I also have my husband grab heavy things (we have limited storage space!) like our dutch oven rather than me doing it.
I hope this helps!