Yup, you have some that swear by physically draining the carbs, others that turn the petcock off and let it idle till it dies, still others that add fuel stabilizer to the tank, ride a few miles, then park it, and then those that do nothing.
Each has their pro and con.
Physically draining the carbs will get every bit of fuel out and you don't have to worry about varnish and buildup, but since the carb is dry, the parts could corrode and rubber could dry out.
Same for running it till it dies, except there may be a little fuel left that gunks up the very bottom of the carb.
Adding fuel stabilizer, some say that it does nothing really or does not last long. But theoretically, it is a great option.
Leaving regular gas in it can cause some varnish and gumming up. But part of that depends on how long it sits.
Me personally, I luckily don't have to worry about it, the longest I plan on not riding is a few weeks at most. So far, I got my bike at the end of August, and it has not sat more than 4 day without being ridden.