I like to bike when I can, but I’m still nervous to leave it even with a U-lock around the frame. I’ve also had a seat stolen before (not even a good one), but I’m not sure if there’s anything reasonable to do about that.
What do you do to lock up your bike for commuting?

I specifically buy my bikes cheap as to not worry about theft. But i haven’t had a bike stolen yet, my last one wore out after about 10 years, before i upgraded to the next cheap bike.