1. Slew mode is what enables you to do crazy things in fsx. One of the main things it does is makes you fly faster and do flips on the ground. In order to do flips there is extra key commands (joystick or control yoke) that make you do the flips and barrell rolls. This is my main method for trolling. In order to activate slew mode you have to press the "y" key.

2. Learn aerobatics on flight simulator. This is an important factor of trolling incase you want to pull up right after you crash into somebody and want to crash into them again. The most important plane to learn how to do aerobatics in is the 747. This is what makes the humor of FSX.

3. Learn how to hover. if you want to be in front or in the control tower while you are in a helicopter, then hovering is a must do in FSX. You can slew but some servers might not have slew mode enabled and it would help to learn hovering. There are certain missions that will help you with hovering.