I'm not sure if this is help or stating the obvious but I've found that consciously making the effort to remember stuff and record it in my mind goes a long way to staying organised on this front. I found the best way to start was with people's names, when someone says "Hi, I'm X" I try to response with "Hi X, it's good to meet you, I'm Simon". Just this simple repetition of their name goes a long way to committing it to memory, if you can say it a couple more times in the conversation you won't forget it again.