some best Points for SEO in 2013

Big mistakes which mostly SEOs done in all SEO.

1) Anchor Tag mistakes -
Anchor tag is best way to make backlink - but now google changed ....
Now google loves to make your variations in keywords + Best anchoring methods like -

a) In your content the keywords Density must be only 1%
b) Use keywords variations - like
Main keyword - SEO Services
Variations - online seo services , cheap seo services, best seo services
Note- You have analysis best keywords research and have to make best variations
c) Use CALL TO ACTION words in anchoring like
Click Here
Read More
Visit Us
Great Article

Which seems ethical in terms of google.

IN URL ANCHORING
d) Use Naked URL like -
http://www.website.com/
www.website.com
website.com
website.com/innerpage.html
www.website.com/innperpage.html
http://www.website.com/innperpage.html

I am sure you can get help with it.

Now If you loss your ranking then DO this -
1) Edit all Articles / blogs / Anchored content where you put your content with above methods
2) Index all links again with process
AND
wait for some time - You will see results.