What kind of doctor? Where does he/she work? How long have they been practicing? A 60 year old brain surgeon in Los Angeles almost certainly makes a lot more than a 27 year old pediatrician in Athens Georgia. This would depend on what the doctor's specialty (if any) is, where they are practicing, what type of facility they are in (hospital, clinic, private office or government facility) and probably a couple of other factors.
Assistant store managers get around $50k and work 15 hour days. They can double that with bonuses every quarter. Store Managers make $70k+ and can double that with bonuses, most make a 7-5 schedule for themselves but when needed they work longer. (not all the time)
The amount of money a waitress makes is determined a lot by his or her tips. If he or she is not getting paid hourly than the total amount of tips she is paid determines her hourly wages. Some waiters and waitresses make around $10-20/ an hour. Waiters also tend to make more money on weekend nights when the restaurant is busier and more customers are coming through.
Menu prices or whether the restaurant offers alcohol are other important factors in determining how much a server makes. The more expensive a customers tab is the typically the more tip a server will make. This is why many servers attempt to "up-sell" their customers by encouraging the purchase of appetizers or drinks. A basic tip is 15% of the total check, and a nice tip is 20% of the total check.
That depends on many things, but for most beginning writers, pay is little to nothing. You must have a lot of experience in order to land a well-paying video game journalism job, and that only comes after practice and loads of "for free" writing. That being said, game journalists earn a respectable wage once they're up and running. I would say the low end is 40-50k a year in the U.S., obviously scaling upwards as the jobs become more demanding. Here's an article with more information: http://www.videogamejournalismjobs.com/?p=56