I've found that a lot of times there _is_ a little switch in my head. Every once in a while I'll be banging my head against a problem, but if I stop and ask myself "how would a physicist solve this?" I can figure it out.

It takes an effort for me to step back and ask myself what the problem is, rather than just sitting down and working on it.

Usually "just sitting down and working on it" works, which may mean my problems are too easy. :)

Asking yourself "how would a physicist solve this?" is a good example of priming. I can't remember if I read about it in Malcolm Gladwell's Blink, but there was an experiment where a couple groups were given a task, with one group told to imagine that they were professors. That group performed significantly better than the other.

But you'll notice that it takes something more specific than "work smarter" to change up the way you approach a problem.

One of the things "work smarter" should mean is: work on something worth working on. Something important enough to you to call out your "extraordinary effort".