A few tips that might help
You've probably read these tips before, but here are some that helped me.
When I took a hostage (or hostages), I used a road on the bottom island which helped me a lot. Where you first crib is, if you stand so that your garage door is to your right, you will see you can either turn left or right. If you pause the game and follow the road left, you should notice it's a really long road that goes all the way past Sunnyvale and to the dome where the Rollerz are situated. I found this road good for hostages that were around 1 minute to 2 minutes. Adding on another tip, after you've completed the hostage, keep driving full speed and find a building where there is a wall not blocked by anything. Jump out before you hit the wall. Sometimes the hostage ejects through the window screen, you can pick up some extra money. It might only be say $100, but do a hostage ten times and it's an extra $1000 or so on top. Not much, but you wouldn't turn do a $1000 would you.
Shooting at Cars:
This is probably the most obvious thing, but when there's an enemy driving behind you, just shoot the driver (if you can). One less car to worry about then.
Hitman List - John and Bill:
On one of the hitlists, I can remember which, you have to kill John. He's with the SWAT team who use the vans as a roadblock. He needs to be killed using a McManus.
The second police-related guy is Bill (needs to be killed using a K6 Krukov, might have misspelt the name but you'll know what gun I mean). I read he was a shooter on the helicopters you get, but when I shot an FBI guy, I got the reward.
Anyway, this is kind of two tips in one.
When you want to kill both these guys (or one at time, your choice) - do it with homies and by a 'Forgive & Forget'. Once you have killed the person you want, steal the closest FBI car and drive through the F&F, which will only be literally a second away.
That's a good bonus if you hate driving long distances with police after you. The other bonus of this: now that you've got rid of the police easily, go and take that FBI car to the Chop Shop that wants it and earn yourself a nice wage - what could be more satisfying?
Added by: WalkwiththeMoment Aug 9th 2009, ID#4816