In the interest of full disclosure, I should probably admit that I no longer reciprocate with everyone on my friends list who assists me. It's capped at 20 per day, and I do assist 20 people pretty much every day, trying to reciprocate for as many as I can. But most likely as a result of this thread, I seem to be averaging getting assisted by a little over 20 people per day, and that means that I can't assist them all back.

I do prioritize assisting those who assist me every day or nearly so, such as the two people who have now assisted me for more than 80 consecutive days. (Yes, I keep track of that.) But I can no longer promise to assist back everyone who assists me, which for now means that the people who only assist once or twice per week don't necessarily get assisted back.