Actually, when you should be using he or she (singular pronouns) it\'s incorrect to use people, they, etc (plural pronouns).
The accepted thing to do is to pick a pronoun and stick with it. Different example? Perfect time to switch the pronoun. It\'s ok to use he for the first topic of your paper, only to switch to she later. That shows fairness.
The generic pronoun for this case is "one," but because we don\'t use the term often, one might feel silly writing it. Of course, if one\'s going for professionalism, he would probably go for it.
Oops, used he! Here\'s how to get around it yet another way:
Of course, if one\'s going for professionalism, using the general pronoun would be a good choice.
See that? You can get around it if you try.
-Eik