Some small tips.....

1. 1 catty = 500 grams, this is Xian or maybe China's way to metricise the weight conversion.
2. Don't be alarmed when the cab driver rounds up or down to the nearest dollar. Eg. 6.30=6 or 6.60 = 7. Apparently cab drivers in Xian are too lazy to use coins or even notes for fractions of a dollar. These apply to most small shops etc except for supermarkets I think.
3. If you think driving in KL is a challenge, then you will probably get heart attack in Xian - some how their judgement of distance between cars can go until 0.00000001 mm so try not to shout out loud when taking a cab ride.
4. Drivers have incredible tolerance for overtaking and "cutting" into each others' lanes - somehow I had this feeling maybe they traded in their car horns for a cheaper price for the car.....they don't horn like we do in KL.
5. Most entrance fees to attractions are governed, even the charges for tour guide and transport charges, so you can be quite safe that you won't be fleeced. But do note that some of the online information don't reflect the latest charges tho'.
6. As usual, food around tourist attractions are more expensive especially those 1 day trip to various tombs etc etc. Then again b'cos standard of leaving in Xian / Shaanxi province is quite low so more expensive is really relative. We had a lunch - 1 vege and 1 taufu + rice and drinks = approx CNY$ 20 + or 30 I think (which is about double the usual price in Xian), which is about RM 15.
7. You must try the various "small eats" - stuff bread with e.g. peanut, "tausa", vegetarian, meats etc.
8. Mutton noodles and bread pieces - like the soup and mutton (tender and yummy) but don't fancy the bread pieces tho'. Yang Rou Pao Mo.
9. Satay China style - they use stainless steel instead of wood/bamboo/"lidi".
10. Some other local attractions we visited - the Muslim Street, Cultural Street and others.
11. Cool noodles. http://www.chinavista.com/travel/info/shaanxi/enxi'an.html (have trouble linking because of the apostrophe)