Left Isn't Right and Other Lessons Learned

Jenn using her Dirty Hand to Eat. Bad Jenn...Bad.We expected to learn a few lessons as our travels progressed.  Below is a sample of those that have recently come to our attention:

1. Left Isn't Right - In Asia left hands are often used for what might be referred to as "dirty work" and should never be used when eating.  Jenn is left-handed and tries to limit the use of her dirty digits when dining publically.
2. Electricity 101 - Plugging a 110 volt surge protector into a 220 volt power outlet will not offer the desired protection for your electronics, and may trip the fuses in your hotel room...and result in a puff of smoke...and a burn mark on the socket.  Enough said.
3. Liquids May Be Too Hot to Handle - Remember the McDonald's coffee in the lap incident in the US?  It has nothing on KL's hot tea on the hand incident of 2014.  It caused a real "sensation".
4. Crazy People Exist Everywhere - Sadly, we've encountered them in Hawaii and now Singapore.  :(
   The good news is, for every looney there are 10 amazingly nice people we encounter during our travels...Maybe even 11.
5. Spontaneity, Pshhh...Forget That - As much as we try to "go with the flow", airlines and the countries we visit have a different plan.  We have to purchase return or onward airline tickets more often than not in order to be allowed into several countries.  The welcome is something like, "We are glad you're here.  When are you leaving?"

We expect to learn more lessons as our travels continue.  What travel tips have you learned in your adventures that you'd be willing to share with us?