Airline companies are cheap. You might be on the flight for a good 4 hours, but you will not get a meal. Instead you should pack tons of snacks and/or meal to suppress any hunger that may occur.

Airline companies' motto: Hungry customers are better than no customers.

Back in the day, talking into a Bluetooth made you look dumb and crazy.  Nowadays, talking into a Bluetooth still makes you look dumb and crazy, especially if you talk about subjects that you are clearly uninformed about.

Just because you didn't have friends over before, doesn't mean you won't have them over later. Yes, this does seem to amaze some people.

Contrary to popular belief, the older you get, the chances greatly increase for you to become less intellectual.  The only thing that makes up for this is experience, and sometimes, even that doesn't help.

Note:  Usually discovered during those moments you happen to listen in on a stranger's conversation and try not to raise your eyebrows and say:

It's a good thing to point out mistakes of groups that you care about. BUT, please don't point them out in such a negative way. When criticizing someone, be sure you have some credibility and that your criticism is flawless or it will not be taken seriously.

Whenever you know multiple people with the same name, be sure that you know who you are talking to.  Otherwise, you are going to feel rather stupid later on.

When talking on your cell phone and you can't hear what the other person is saying, saying "Yes, oh really?" does not always answer their question...Sometimes it gives away that you are not listening to them or the fact that the signal is bad. In this case, just be annoying and ask them repeatedly what they said.

Always double check your work, especially work involving words.  Otherwise, you may have some amusing typos, especially those that are homophones!

When a friend tells you to go to a remote island to "film" something and the props they bring are rocks, be wary!! You don't want to be the next "missing person" victim.

Never ever take family or friends for granted.  If you do, one day, you'll find yourself missing them.