WARNING: Spoilers (sort of) ahead.

Loyalty to a junkie girlfriend will lead to involvement in a diamond heist and a "Pulp Fiction-esque torture scenario.
So, basically, avoid.

Always shoot the barrels.
Always.

There has got to be a better way to destroy moving vehicles from a motorcycle than pipe bombs.
Like remote mines or C4 or something.

When your club president gets out of rehab, don't listen to him.
A deal with the Triads? When has that ever worked? And all you'll get for your trouble is a situation in which you have to break into a prison.

Any time you enter a vehicle, from anywhere, classic rock will be playing on the radio.
And while the station has Dio, it also has Rod Stewart.

Bikers are, at heart, decent people, and also apparently celibate.
Eastern European immigrants, however, get tons of ass.

Shooting a guy who is shooting at you from a opened limo window is a bitch.
And when you finally destroy that fucking car, it will blow up right on you.

Sometimes, a congressman is the only one you can trust.
And you'll see his dong.