Do not put all your eggs...

I learn it from a interesting article of a Huber, he show a discussion  of webmaster about Google recent algorithm change. Many of them lose 30% to 70% of their traffic and all of you know traffic is money. With the loss of traffic, we lost our money. If we rely on Google and when they change something, we lose our work and start again to follow them.
Don't put all your eggs in one basket, this is the key to reduce our loss. When we diversity our income, example: traffic from many sources, if one of them change something, we can lost from this source and remain others.
And I agree with him the main stream is important and may be weak point. Because we make money from it, so it has many competitors and with the change, it will be a big affect to our income.
You can read more this article at  http://hubpages.com/hub/Diversify-your-Income-sources-through-self-employment

Feel free to share your comments about it.