Don't know - gamefaq has some hints/tips - I suspect "take this quest" or take "that quest" is difficult due to randomness. I'm finding the game quite difficuilt (on the easiest level). I can almost never complete a quest in time (I'm trying to find better engine but by the time I get to the location that has a good engine it is gone
)
Also, I'm constantly being asked to attack ships but when i do so I make a lot of enemies. I was 'fraid to say no but now I suspect I better (on my fourth restart - about 5 hours of playing).