Since I bought my (1890, last majority renovated in the 70s) house a year ago, I've been taking on lots of DIY projects-- it's been rather empowering.
My latest was giving the bathroom a makeover-- it started with the old ugly vinyl floor tiles starting to come loose, so I decided to remove and replace them with new peel-and-stick vinyl tiles. In which case it made sense to paint first, while I didn't have to worry about the floor. In which case it also made sense to repaint the vanity and mirror frame with left over cabinet paint from the cabinet repainting I did last summer. So that turned into several weekends of project, but it looks SO much better now.
One of the most satisfying, which I did last fall after it became apparent that water was going to pour into the unfinished basement every time it rained really hard, was to put in drainage pipes to take water from the downspouts at the side of the house where it was getting in, and carry it out to near the street in front. A few hundred dollars worth of snap together components from Home Depot and a couple weekends of work, and no more water in the basement since. This spring I reinforced the system by building up a dirt berm sloping away from the foundation and getting grass growing on it.