If you have applied the previous recipe to your blog, you now have a stunning Advertise page with your blog stats. That's great, but how can the advertisers pay you? Sure, you can use a contact form and ask advertisers to email you and then send them your paypal ID. But going ahead with this procedure has a few cons:
Long and boring procedure: The advertiser must send you an email, then you have to send him your paypal ID, get the payment, and finally put the link/banner online.
Can turn off some potential advertisers: The long procedure described above can turn off advertisers. Most of them are busy and don't have any time to lose. They want their banner up quickly.
No reminder when paid time is passed: If your advertiser paid for one month advertising on your blog, neither you nor him will be reminded when the time has passed. The result could be that you forget the date and leave the ad online longer than scheduled.