I use 2 ulocks and have a bike rack that makes it easy to fill the space inside the u-locks. One u-lock goes around the back tire and seat tube and bike rack. The other goes around the front tire and down tube and the bike rack.

My bike is the hardest to steal in the area. I work on a college campus so there are plenty of other easier targets, then my bike.

The other advantage I have is that since I work in the same building all the time, I just leave my u-locks lock to the bike rack. So I have no need to carry them. If I have to stop somewhere on my commute, then I take a u-lock with me, but that is rare.