When is it appropriate to give out reputation points? Are they intended for anyone who helps you in any way? Or are they reserved for crits and things like that? Left to my own devices, I fear I'll be throwing them around like gold stars in a kindergarten class.
I often use them just to exchange greetings and wise-ass remarks with my friends on the forum, with no connection to their posts at all. That's why many of us have tens of thousands of reputation points. The value of them, for most of us, is the comment that goes along with them. (I never give points without some kind of comment, even if it is only "I agree.")
Beyond that, I use them when someone says something funny, clever, profound, sad, or interesting, or that I just like or agree with.
Occasionally, I use them to quietly tell someone they've got a fact wrong or made a typo, and should correct it. Sometimes it's kinder, so that they can correct it on their own without public embarrassment. (Other times, I call it out in the thread. It depends on what the error is and who is making it).