Have a saved game file from the original Mass Effect on your hard
drive, and use that profile in Mass Effect 2 to get the following 
bonuses:

100,000 credits: Mass Effect character with the "Rich" achievement
30,000 credits: Level 50 Mass Effect character
2,000 experience points: Level 50 Mass Effect character
5,000 of each resource: Level 50 Mass Effect character
50,000 credits: Level 60 Mass Effect character
4,000 experience points: Level 60 Mass Effect character
10,000 of each resource: Level 60 Mass Effect character