Ask HN: How do you motivate yourself at a boring corporate job?

I work at a big software company that treats its workers well. My product is well-respected in its niche, and I'm working on features that will make our customers happy. Nonetheless, I find it almost impossible to give a crap about the code I'm writing.

This doesn't really matter when the work is easy; I can do it on autopilot. But as soon as I encounter a tricky design problem, I want to give up because I don't care about the product enough to put in the effort.

I might switch jobs, even though I've only been here 6 months and would probably burn bridges by leaving. But, short of that, do you have any tricks to motivate yourself in this type of situation?