The key thing these days is to act appropriately for your age category. Conversation should especially be appropriate. By now you should know that no one you meet is likely to have seen the movie "Old Yeller" except you and you have to admit you rarely think about it. No one likely cares how you like to dress your hot dog. No one wants to hear about the best lunch in Mobile in the 60's. Yes, as Merle Haggard says, Momma tried, but spare the details. No one cares if you squeaked by on your ACT score with a 17. Some things, most things these days, are best kept to yourself.