Adsense earnings are like the stock market.

Have you ever talked to a financial advisor? If you do, they are going to tell you one thing repeatedly. You must diversify your account. By diversifying your account, you lower the risk of loosing all of your earnings. You know the old idiom "don't put all your eggs in one basket". Well, the same applies to adsense.

Let us say you have poured all of your time and effort into one site about widgets. You have acquired Hundreds of links, traffic is doing well and you are getting high search engine results. You are averaging about 50-60 dollars a day with clicks. What happens if that niche starts paying .03 or less a click for widgets? Now you are driving 2,000 people to your site a day, getting 300 clicks and it is all for 9 dollars.

Of course, everybody starts out with his or her first site. Take the knowledge and earnings you have gained from your first site and branch out. Reinvest at least some of what you get out of your work and it will start building like a snowball. Just do not forget to pay attention to your older sites and update them as regular as possible.

Therefore, here is the connection. Create a few sites that you enjoy and divide your time amongst them. Drive 650 people a day with three sites your adsense portfolio will be much more stable. If one of your niches takes a large drop in earnings, you have other niches to fall back on. Hopefully another site will pick up the slack during slow times.