A lot of newbies think that you can only earn in Google Adsense whenever a visitor click your adsense ad. If you are one of those newbies read on. Google can make you money more than there .01 clicks. 
Below is the list on how much will you earn for each referral that you make to Google.
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AdSense:
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When a publisher who signed up for Google AdSense through your referral first earns US$5 within 180 days of sign-up, you will be credited with US$5.
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When that same publisher earns US$100 within 180 days of sign-up and is eligible for payout, you will be credited with an additional US$250.
- If in any 180-day period you refer 25 publishers who each earn more than US$100 within 180 days of their respective sign-ups and are all eligible for payout, you will be awarded a US$2,000 bonus (bonus payouts are limited to 1 per year).
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Firefox plus Google Toolbar: When a user you’ve referred to Firefox plus Google Toolbar runs Firefox for the first time, you’ll receive up to US$1 in your account, depending on the user’s location. Your referral must be a Windows user, who has not previously installed Firefox, in order for you to receive credit.
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AdWords:
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When an advertiser you refer first spends US$5 within 90 days of sign-up (in addition to the US$5 sign-up fee) you will be credited with US$5.
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When that same advertiser spends US$100 within 90 days of sign-up, you will be credited with an additional US$40.
- If in any 180 day period you refer 20 advertisers who each spend more than US$100 within 90 days of their respective sign-ups, you will be awarded a US$600 bonus (bonus payouts are limited to 1 per year).
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Pack: When a Windows user you’ve referred to Pack downloads and installs the product, you’ll receive up to US$2 in your account.
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Checkout: When a user signs up as a buyer and completes a transaction through Google Checkout of at least US$10 (before tax and shipping) within 90 days of sign-up, you will be credited with US$1.
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Google Apps: When a user signs up for Google Apps and there are one or more Google Apps email accounts in use for four consecutive weeks, you will be credited with US$5.
So next time you make a blog or a new website you may want to consider putting some of Google’s Referral products.