One of the best drills will be invaluable: sealing windows and doors with drafts. Uncover a dishwasher that isn't draining. Low water pressure can have several causes, but the solution can be as simple as adjusting the pressure reducing valve. You'll find this bell-shaped valve near where the main water pipe enters the house.
Loosen the locknut before making any adjustments, and then turn the valve screw to affect water pressure. Clockwise, the pressure increases and, in the opposite direction, reduces it. Adjust half a turn and then check; repeat as needed.