The CNN Travel staff has put in some hard miles.
Collectively, we've touched down on every continent on earth and we're closing in on every country.
But we're nowhere near perfect travelers.
Every one of the travel chokes on this list comes from painful personal experience -- often multiple times repeating the same mistakes. (We're nothing if not persistent.)
At home, with your complete wardrobe available, there's no reason not to run through work, workout and working-the-clubs outfits in a single day.
But when your life is crammed into a couple bags, your fashion morality changes.
Those socks you wore on the plane should be good for another go.
The purple tee you slept in ought to be alright for a third wear.
Yesterday's undies? Well ...
According to a recent survey by Travelodge, two-thirds of travelers typically return from a trip with at least six unworn outfits.
The lesson: You don't need a new set of anything for each day of a trip. Figure on at least two wears for (almost) everything.
2. Not buying something you like as soon as you see it
You think you're gonna circle back to that shop.
You think you'll see a cheaper, better version somewhere else.
That evocative street painting or those Metallica nesting dolls you didn't buy? Now not having them will haunt you for the rest of your life.
When you see something you like, just buy it and live without regret.
3. Not checking your phone plan before traveling abroad
What you call "international roaming" your phone carrier calls "shareholder dividend!"
A week of texts from Singapore or St. Lucia shouldn't cost more and hurt worse than open heart surgery. But it happens all the time to travelers who fail to check their phone plans before departure.
4. Trusting "near city center" descriptions
"Near city center" is like a Bible verse -- open to vast interpretation.
When you find the money you saved on your "near city center" hotel is being spent on 30-minute commutes and outrageous taxi fare, you know you've committed one of the cardinal sins of travel.
Related note: Except by purely technical definition, if you're staying near the convention center in Portland, Oregon, you're decidedly not staying "downtown" (as is popularly advertised) by any local sensibility.