Target also misspelled keywords in your website traffic promotion.
Do you know people have made fortunes even with misspelled domain names. How about gugle.com? Its landing page with pagerank three, much traffic. without any effort from the owner. As many users come here just in search of google.com

So if you want an extra free traffic, keep in list of your keywords all commonly misspelled keywords also.

If you are going to sell an ebook called website traffic tips and you want to start the website traffic promotion for that ebook selling website. Your possible misspelled keywords can be a huge list.

Which includes many type of errors like:

Duplicate Characters: Users very often do this error, as they keep press the key which result in more than one time typed the same character.

Keyboards Proximity errors: This is due to the design of the keyboard. Like S is mistakenly pressed instead of A.

Misplaced Characters: This type of errors is due to the minor typing skills of the users. She try to write TIPS, and write ITPS…

Missing Characters: This is done by many of us even in offline world. Instead of WEBSITE sometime we wrote only WBSITE…

Let me give you a complete list of possibly misspelled keywords to our main phrase WEBSITE TRAFFIC TIPS:

ebsite traffic tips
ewbsite traffic tips
wwebsite traffic tips
qebsite traffic tips
eebsite traffic tips
2ebsite traffic tips
3ebsite traffic tips
aebsite traffic tips
sebsite traffic tips
wbsite traffic tips
wbesite traffic tips
weebsite traffic tips
wwbsite traffic tips