I was just wondering what proportion of your traffic comes from search engines? For me it is about 50%, is this typical of what other people are getting?? http://www.melonfool.com
You should aim to have this percent around 40%, the rest should be from other sources. Why you ask? What if you lose your SERPs, then you'll lose all your traffic and revenue. Gear your site to depend on less than 50% of it's traffic from organic search results.
On my case almost 70% on average on all of my websites traffic are coming from search engines and more than half of this percentage are coming from Google only.
For some of my sites 80 to 90% comes from Google if you include returning visitors who originally found the sites including Google.