I do a lot of travels in the US and around the world. I thought, as a continuous thing, here are some little tips and stuff for people when they travel from learned experiences. If you’ve got one to contribute, feel free to comment!

• Personally, I now prefer aisle seats. I used to like window seats, but for the most part, the thrill has passed. Get an aisle seat so you can easily access your stuff and get to the bathroom without bothering anyone around you.
• Speaking of bathrooms, when you’re on a flight with a movie or two, sacrifice a little movie time and hit the bathroom before the movie is over. Trust me, your bladder will thank you for it. Why? Everyone goes after the movie ends and the lines will be horrendous.
• When flying to Taiwan or some parts of Asia, try to fly EVA Air. This is not an endorsement, but for those long flights, EVA offers what they call “Deluxe”, which is an upgrade from Coach (steer class), but you don’t have to pay the premium of Business or First Class.
• Frequent a particular 4-star+ hotel? Get to know the staff. You’ll get perks down the line and people will wonder who you are when the hotel staff address you wherever you go.
• This is a pretty common tip, but when you’re traveling to a foreign country and need cash, just exchange enough to get by first. After that, for any large amount of cash, use the ATM or one of the more reputable banks. Airports charge up to 9%, hotels charge up to 8%, and those “no-commission” stalls, stay FAR away from them as they charge up to 10% hidden (you usually need to change up to $1000USD to make their minimum). When I used the ATM in HK, the banks took a total 1% as a foreign transaction fee. I’m not sure if there’s a minimum transaction fee, but usually $300USD+ is a good bet for a low fee. Don’t change money through the ATM if you’re going to just get $25USD.
• via ANg: I carry a dummy wallet around that contains enough money to get around during the day, along with some expired credit cards/ATM cards with modified signatures. The idea is that if it gets mugged/stolen, they’ve only taken a little bit.
• via bob: Check your passport to make sure it’s not expired. Also, days before your flight, pack your passport into your carry-on or suitcase. I’ve left for the airport a couple times and have had to turn back because I left it on the kitchen counter or something.
• DOs and DON’Ts of Airport Security. [via Gadling]
• Don’t get ripped off!!
• International Prepaid SIM cards
• On long flights, along with my carry-on luggage, I always include a ‘junk pouch’ of sorts. Call it what you will (murse?), but the junk pouch is good for all sorts of things while on the flight (e.g., ipod, headphones, tylenol, mints(!), vitamins, journal, etc.). You don’t always want to get up out of your seat to grab stuff from the overhead bin, so it’s nice to have something small-ish to stash in the front seat pocket. I recommend something to the aspect of the Eagle Creek Pack-it Sac since it’s not too large. Get one that’s see-through and plasticsized, just in case. Oh, and don’t forget to take it with you when you deplane!!
• This has been mentioned elsewhere, but I’ll repost this, just for you. Use a spare toiletry bag to pack all your electronics/chargers/batteries, etc. It’ll cost you nothing since you already own it and they’re compact enough to stuff anywhere. I repeat, don’t buy ‘gear cases’, chances are you already own something that can work.

More to come! Check out the links above to add or suggest your own travel tips!