Pronoun Problems

Perhaps you've noticed a problem with my pronoun usage, specifically that I appear to use singular and plural first person pronouns interchangeably. You'd be correct. See, I still get confused about which to use when referring to the time in the past when I was part of a "we" unit, most notably when I'm talking about my China days. See, I wasn't in China, we were. But now there is no "we," so what's a girl to do? Anyway, I apologize for the confusion, but I still haven't figured out how to resolve this one... Oh yeah, and I also tend to just refer to him as "him," without a proper antecedent. Sorry, grammarians! But I promise it'll be o.k. :-)