If you don't have the first rule memorized, you don't need to handle or own a gun.
Don't arm someone with a deadly weapon if you aren't 100% sure they know gun safety.
Know your legal risks and plan accordingly.
Don't carry somewhere that asks you not to, just because their sign is misspelled.
Don't display your weapon unless you're about to use it.
Don't use your weapon unless it's absolutely necessary.
Be prepared to be stopped, with lethal force, if there's a misunderstanding:
Be aware of hazardous attitudes. It comes from aviation, but it applies anywhere safety is involved. Guns are no place for macho or invulnerability attitudes to be unchecked.
An online forum with discussions about TX CHL:
NOTE: All of this is my personal opinion. Definitely consult a lawyer, TX state attorney, or at least a licensed instructor for more accurate representations of the law. Don't make any choices based on my opinions.