Question: how long after you have a job interview should you wait before following up with the potential employer? 

Answer: Send a Thank you note to the individual that interviewed you right away.  It will take a couple of days to get to them and will refresh their memory.  Next time at the interview also ask if you can call in a week to discuss the status of the position.
This question from the Yahoo Q&A forum is categorized in the topic: Science & Mathematics