The basic structure of each training exercise is the same, move through the course quickly, shooting the red targets to get points. Avoid shooting the blue targets lest you lose points and if you see a yellow target, shoot it for bonus points. The big thing to keep in mind here is that for the pistol, shotgun and SMG exercises, the targets shoot back. Doing all of the vigilante missions first so that you have double armor may not be a bad idea. Work on moving quickly, and make sure to shoot the yellow target and you shouldn't have any problems getting gold until the sniper rifle exercise. In that exercise you first have to assemble your rifle quickly and then take out targets through the scope. The d-pad is less than optimal for moving the scope, which makes this training exercise a pain, but if you persevere bargains galore await you.
Riding Shotgun
There are five Riding Shotgun missions and all involve the same thing. You get in a pickup and drive around while you and your henchman work on shooting rival gangs. The goal is to score 1250 points in 90 seconds. The point values are higher for killing gang leaders than for destroying gang vehicles, so they should be your primary targets. Keep driving, keep shooting and work towards your medals.
Algonquin Riding Shotgun
Purgatory
The Meat Quarter
Bohan Riding Shotgun
Industrial
Broker Riding Shotgun
South Slopes
Willis
Raid Spanish Lord's Warehouse
During the main story missions you'll find and then raid the Spanish Lord's Warehouse. Once this mission is completed, you can keep going back and raiding the warehouse to get drugs. You'll have to do it once more to count towards 100% so do the same thing you did in the main story mission. Get there, bust open the gate, make a mad dash for the van and then drive away. It's fairly simple and you get to keep whatever you find in the van so double-yay for you.
Safehouses
There are 21 safehouses to be obtained in the game. All but two can be obtained either by buying them or by getting them as you progress through the main story. For ones that can be purchased, simply head to the blue house icon on your GPS, sign your name on the dotted line and the house is yours. If you're low on cash and need to pick and choose which ones to buy, make sure at least one safehouse is secluded as you'll need a secluded safehouse for hijacking AmmuNation trucks and rival gang vans. It's not a bad idea to have a secluded safehouse on each island to minimize travel in stolen vehicles.
Two safehouses require a little extra work to obtain. One is obtained by completing Wilhelm's random character missions and the final safehouse can only be obtained by winning it from a scratch-off card. All that's required here is for you to find a scratch off place that's selling the "I'm Rich $" card (try the scratch off place in Cerveza Heights, Algonquin), and then keep on buying cards and scratching them off. Match three house symbols to win the final safehouse.
Drug Dealers
As you progress through the story you'll come into contact with various drug dealers all there to help you make a boatload of money. As you drive around Liberty City, you may see a blue dot appear on your GPS. That means that an undiscovered dealer is nearby. To "find" the dealer, head to the blue dot and enter the trading screen. You don't have to do a trade, simply browsing their merchandise and then getting yelled at them counts. Exit out and the dealer's dot will be replaced with a briefcase and the dealer will be placed on your GPS. To get some free dealer locations, open up the drug trade map in the trade info section of your PDA and open each gang section. If you haven't discovered a dealer for that gang yet, you'll be given the location of one. Find all 80 dealers to continue on your way towards the elusive 100%. Rather than list the location of all of them, here's how many there are on each island.
Algonquin
46 dealers
Broker
22 dealers
Bohan
9 dealers
Colony Island
1 dealer
Charge Island
1 dealer
Happiness Island
1 dealer
Trophies
Along with making money, the dealers will help you obtain the various trophies to be won in the game. There are eight trophies total, all of which you need to get 100% and all but one involve drug dealing. For the trophies that involve multiple products, you don't have to deal both products in one deal. The trophy will automatically unlock once you fill the requirements.
Jeweled Bong
Do a weed drug deal, do a downers deal.
Diamond Pill Box
Do an ecstasy deal, do an acid deal.
Platinum Syringe
Do a coke deal, do a heroin deal.
Silver Safebox
Make $2000 in a single deal. Coke and Heroin are your friends here, however disturbing that sentence may be. You can either use your drug trade to seek out gangs that are big on these two, or simply wait for a tip that someone is offloading these drugs cheaply, stockpile the goods and wait until you get a tip that someone is willing to pay high prices for your supplies. As long as you take time out of the game to make use of the tips before the time runs out you should have no problem getting this one over the course of the main story.
Wooden Spoon
Lose $500 in a single deal. This one is easiest done early on when you don't have a stockpile of drugs that you either stole or got on the cheap. Use your drug map to find what drugs gangs aren't interested in and then go to them and sell them that which they don't want. Lose $500 on the deal and this trophy is yours.
Golden Binoculars
Find 40 dealers. Drive, find, deal, repeat x40.
Titanium Briefcase
Find 80 dealers.
Jeweled Key to the City
Own all safehouses. If you've been dealing drugs on the side, getting the money to pay for all of the safehouses should be no problem. Pick and choose early in the game to get the most for your money, but once you have the coin, go crazy.
Unique Stunt Jumps
GTA wouldn't be GTA without unique Stunt Jumps and Chinatown wars is no exception. Although you’ll find plenty of ramps throughout the city, in Chinatown wars, a jump doesn't count as a unique stunt jump unless you smash through a Rusty Brown Rings donut shop billboard. If you see one of those billboards as you're traveling around the city, look for a nearby ramp that will help you smash through it.
Algonquin
13 unique stunt jumps
Bohan
3 unique stunt jumps
Broker
14 jumps
