Some useful tips, yes, and some not-so-useful. The Unicode trick isn't exactly a Microsoft Word trick--it's more a Windows thing. The Hidden Calculator left me flat; I'd rather use the Windows Calculator, but YMMV. My only issue with these tips is that the problems they solve tend to arise so infrequently that I don't repeat the solutions often enough to remember them.
I fail to understand how this belongs on Hacker News.
I hear Microsoft Word has a feature that instantly uploads what you type to the cloud. It's called Numbers Symbols Alphabet (NSA for short).