After finishing GTA:
I just hustle... call Dwayne's boys and go into the bad neigbour hoods and do stick ups... get the cash and run. Sometimes groups of guys will all pull guns and you end up in a shoot out. I just let the boys shoot and then I use the cell phone to call the police. They soon hit the scene, you have your guys shooting the other thugs and the police shooting at everyone (except you).
Then roll around until you see a group of guys in a car, usually do this late at night in a bad area with lots of prostitutes. Jump out of your car blocking their path and run up and throw punches into their window. They will jump out of the car to try and fight you 2 or 3 on 1. When Dwayne's boys see this they will pull guns out and open fire.
After that, head to the strip club with your homies. Pull up out the front, before the door man can say anything punch him in the face. Again, Dwayne's boys will finish him. Walk in to the club and everyone will try and fight you. Then blow anyone you can away, when you leave through the door the 5-0 would have surrounded the place, duck behind the park cars and give them some blind fire - continue shoot out, jump in car and cop a chase - Thats just how I roll.