If your passport are expired or will be expired soon, do not wait until last minute to renew your passport. Do renew your passport at least 2 or 3 months before you travel.

Some countries do not require Malaysian to do Visa. However, if you are travelling with foreigner friends or family members to the countries where you yourself no need Visa, it does not mean they no need visa also. Warn them to do the Visa.

And, it is better if you can purchase travel insurance for your entire trip.

If you need to use your phone for entertainment purpose on your flight, or if you need to use a PDA, make sure it has "flight mode" or "airplane mode" feature. And, please note that some airlines staffs not even know what is "flight mode" / "airplane mode". This feature will disable all wireless transmission (bluetooth, wifi, etc) of your device, so that you can use the device on the flight. This feature must be enabled before you board the aircraft.

If you need to use laptop on the flight, please ensure all wireless transmittion features (WiFi, bluetooth, etc) are disabled before you board the flight. Do, note that some laptop may automatically enable the wifi feature after reboot even you disabled it before reboot. If your laptop are in this case, and you are using Windows, use Windows device manager to disable your WiFi adapter.

If you are travelling to USA with electronic devices (e.g. laptop, mobile phones, Ipod, music / video player, or others), please note that Obama has given the airport customs the rights to seize your electronic devices for a few days and search your files, including deleted files, WITHOUT SUSPICIOUS. If your devices consist of pirated or illegally downloaded videos / musics or other illegal contents, you will be in trouble.

Delete your files before you go to US is useless, as they can be recovered.

Possible solutions:
1. on your laptop, install Truecrypt (open source, cross-platform, http://www.truecrypt.org/) or FreeOTFE (open source, available on Windows and Windows mobile only, http://www.freeotfe.org/). These 2 software let you create virtual partitions which you can store your files. You will need passwords to open/mount the virtual partitions.

2. And, use KillDisk (http://www.killdisk.com/) to Wipe the free space on your storage devices. Because, if you move your files to the virtual partition created by Truecrypt or FreeOTFE, the word "move" in computing actually means "copy the files to another folder then delete it from the original folder", deleted files can still be recovered from the original folder. That is why you need to wipe the free space of your storage device.

It depends on the airline rules. Most airlines only allow 1 hand carry baggage.