Make sure that your passport and visa are ready ahead of time. It is safest to go through a legitimate travel agency in your country as there are many visa agencies on the Internet that will rip you off or scam you. Obtaining your visa at least a month before your travel date will be safest and the most cost-effective as you won't have to worry about expediting fees.
Get your immunizations up to date at least a month before traveling. Although no immunizations are required to enter China, it is best to ask your doctor what vaccinations he recommends. Common ones to be concerned with include Hepatitis A, Hepatitis B, Typhoid, Japanese Encephalitis, Rabies and the flu vaccine.
Use sturdy and compact luggage. Especially if you are planning on traveling within China, you will be glad you traveled light with easy to carry luggage. Also try to pack as lightly as you can. You will probably want to bring souvenirs home so leave room to come home with more than you go with.
Pack a simple first-aid kit with ample medicine. A change in climate, time zone and especially diet will likely effect your body so be prepared. Medicines to settle your stomach when eating new foods are especially useful for most tourists. Hand sanitizer will also be appreciated.
Learn a few useful Chinese phrases such as "How much?" and "Where is the restroom?" Many Chinese can speak a little English, especially in popular tourist spots, but knowing some words or having a Chinese phrasebook will be very helpful.
