multiple streams of income

As a blogger, the best way to make real money is by having multiple streams of income. Do you practice this at all? If so, what all multiple streams of income do you have?

Multiple streams of income... If you follow veteran bloggers, they'll all tell you that you'll make the most money from blogging by having multiple streams of income. A lot of bloggers don't bother with that, and they just focus on one specific stream. Many of these bloggers burn out because...