Gambling
Holding down the space bar when gambling will improve your luck for the first three rolls.
Forklift
To receive the forklift, option-click the title screen so you get the EV/MST3K theme. Wait until "-MCB 4:35 A.M." shows up, then hold down control-command-option-shift-F. You'll hear "They'll try to kill 'im with a forklift!" The loaded pilot file receives the forklift.
Planetary Defenses
If you own a Kestrel, a great way to either rake in the dough or expand your fighter capacity is to demand tribute from planets that utilize Lightnings for planetary defense. Any Lightnings that are disabled can easily be boarded and taken as tribute for your own use or resale.
Satellite of Love
Hold down S,O,L at the startup