I don't say I did things I didn't do I just emphasize what I've done and let people assume it's more than it is. For example, if I see someone and I went to the store once last week and talked to a friend once last month I'll be sure to mention something about my trip to the store and having talked to a friend. I've learned that most people will assume I do both all the time.

I have no problem doing this with people I've just met but it's a habit I need to break. I think what (JD) said is really true.