I saw a pretty good rundown of “laws” that people who carry should ingrain in their heads (even those who carry openly). I’ll refrain from copying/pasting the article, but it is located here:
http://dailycaller.com/2015/07/14/massad-ayoobs-10-commandments-of-concealed-carry/
It is a good read…trust me. Much of it is common sense, but it is solid advice.