You can give your players incentive to do things, but if it’s not the incentive they’re looking for they will probably demonstrate it by their in game actions. Some examples of player incentives include:
Bad and Wrong Music Lessons
A music lesson for people who know nothing about music, from someone who barely knows anything about music.
Linux vs. Windows
Finally, the age-old debate has been settled.
The Best of 2014
My picks for what was important, awesome, or worth talking about in 2014.
The Best of 2016
My picks for what was important, awesome, or worth talking about in 2016.
A screencap comic that poked fun at videogames and the industry. The comic has ended, but there's plenty of archives for you to binge on.