I agree with Raellus. T2K v2.2 can give you some clues, like background skills and educational and civilian careers.
As an alternative, a good friend used an interesting method some time ago, with good results. The game was not T2K, but this is not very important. He prepared a little questionnaire for his players. Each question had four possible answers. Each answer implied a modification of the average level of an attribute or a certain degree of expertise in some skill.
As a funny point (if you follow T2K v2.2 rules), you could determine the relation between agility and strenght of your player if you know his/her weight.
