What do I not know?

So I was helping someone at work today. He had a process that took hours to run. I helped him trim it down to taking a matter of about 15 minutes.

Without going into any detail (because it doesn't matter), I basically showed him a feature that he wasn't aware of in the system he was using to build the process. He was happily surprised that it existed.

But it made me think...what don't I know about? What aspects of my life, job, or anything that I do, could be either easier, faster, more enjoyable, or whatever, if only I knew that [insert unknown thing here] existed? Essentially, the question is "What am I missing?"

I know that there's tons of stuff out there that I don't know. But how do I go about seeking that information without inundating myself with just that much more stuff that doesn't do anything to improve my situation?

Any thoughts? If anyone out there knows something that I'm missing, let me know.

I don't know. But at least I know that there are things that I don't know. It's a start.