Char Map works okay, but instead of going back to it and trying to remember where the characters you want are in the very long listings of characters in the more enhanced fonts, just copy them once into a separate "Chars I Use.doc" and put it close to where you're likely to keep docs that use them.
If you put a "!" at the beginning of the filename, it will almost always appear at the top of the listing in Win Explorer and will be easy to find - until you've used the ! trick for so many "important documents" that your list of things you need to find quickly gets too long to find anything and you'll have to start using a "!!" for really important stuff, and eventually !!! for really very important stuff ... until .....