No strenuous housework (no cleaning the bath, doing hoovering, ironing qualifies I think )
One thing my MW said was 'don't stand on one leg when you put your pants/trousers on - sit down'
NO shopping trolleys (Internet shopping is compulsory with SPD - check out the promotional codes sections, there are always free delivery codes)
If you have to lift, avoid twisty lifting (IYKWIM)
Knees together and pelvis straight (esp when slobbing out watching TV at the end of the day)
Get out of the car with your knees together.
Get some kind of matress topper - even just a single duvet on top of your mattress will be good enough.
Having the duvet between my legs helped. Remember that you will need a second duvet to cover you.
Yoga. Core stability. Aqua Natal. Anything to strengthen the core muscles. Pelvic Floor exercises won't hurt either.
HTH