This is a text conversion of "The Web Developer's SEO Cheat Sheet".
You can find the original article and cheat sheet, by Danny Dover, here:
http://www.seomoz.org/blog/the-web-developers-seo-cheat-sheet
====== Important SEO HTML tags ======
==== Title Tag ====
<head>
<title>Keyword</title>
</head>
==== H1, H2, H3 ====
<h1>Most Important</h1>
<h2>Second Most Important</h2>
<h3>Third Most Important</h3>
==== Bold, Strong (Same Worth) ====
<b>Keyword</b>
<strong>Keyword</strong>
==== Image (XHTML) ====
<img src="keyword.jpg" alt="keyword" />
==== Hyperlink ====
<a href="http://www.mysite.com/webpage.html" title="keyword">Keyword in
Anchor Text</a>
==== Hyperlink (No Followed) ====
<a href="http://www.mysite.com/webpge.html" title="keyword"
rel="nofollow">Keyword in Anchor Text</a>
====== Recommended Title Tag Syntax ======
Keyword < Category | Website Title
====== Common Canonical Homepage Issue ======
To condense the four default homepages into one homepage, use 301 redirect
(See next section) to correct for
erroneous incoming links and make all internal links point to your domain
using the syntax 'http://www.mysite.com/'.
Always include trailing "/" on folders.
==== Bad ====
http://www.mysite.com
http://mysite.com
http://www.mysite.com/index.html
http://mysite.com/index.html
==== Good ====
http://www.mysite.com/
====== 301 Redirect for Apache ======
Write to a file called '.htaccess'.
The file is named only as an extension.
Hidden files must be viewable in operating system.
mod_rewrite must be enabled.
----
Redirect 301 /oldpage.html http://www.newdomain.com/newpage.html
Redirect single file or directory to a new file or directory on a
different domain
----
RewriteEngine on
RewriteCond %{HTTP_HOST} ^mysite.com [NC]
RewriteRule ^(.*)$ http://www.mysite.com/$1 [L,R=301]
Redirect http://mysite.com to http://www.mysite.com
Affects entire domain.
----
Entire site:
Redirect 301 / http://www.newdomain.com/
Redirect permanent /old http://www.newdomain.com/new
Redirect entire domain to a new domain as either a 301 (recommended) or
302
====== Search Engine Indexing Limits ======
*Does not apply to websites with significant authority
==== Page File Size ====
No more than 150 kilobytes (Before Images, CSS and other Attachments)
==== Amount of links ====
No more than 100 unique links per page
==== Title Tag ====
No more than 70 characters
==== Meta Description ====
No more than 155 characters
==== Parameters in URL ====
No more than 2
=== Bad Example ===
http://www.mysite.com/brands.php?object=1&type=2&kind=3&node=5&arg=6
=== Good Example ===
http://www.mysite.com/brands.php?nike
==== Depth of URL ====
No more than 4
=== Bad Example ===
http://www.mysite.com/people/places/things/noun/danny/car
=== Good Example ===
http://www.mysite.com/people/danny/
====== Important Search Engine Robots ======
==== Google Search ====
Googlebot/2.1 ( http://www.google.com/bot.html)
==== Google Search ====
Googlebot/2.1 ( http://www.googlebot.com/bot.html)
==== Google ====
Image Search Googlebot-Image/1.0
==== Google ====
Image Search Googlebot-Image/1.0 ( http://www.googlebot.com/bot.html)
==== MSN Search ====
msnbot/x.xx ( http://search.msn.com/msnbot.htm)
==== MSN Search ====
MSNBOT/0.xx (http://search.msn.com/msnbot.htm)
==== MSN Media Search Robot ====
msnbot-media/1.0 (+http://search.msn.com/msnbot.htm)
==== Windows Live Product Search ====
msnbot-Products/1.0 (+http://search.msn.com/msnbot.htm)
==== Microsoft Search for Mobiles ====
MSNBOT_Mobile MSMOBOT Mozilla/2.0 (compatible; MSIE 4.02; Windows CE;
Default)
==== Alexa / The Internet Archive ====
ia_archiver
==== Alexa / The Internet Archive ====
ia_archiver-web.archive.org
==== Alexa / The Internet Archive ====
ia_archiver/1.6
==== Yahoo Blog Search ====
Yahoo-Blogs/v3.9 (compatible; Mozilla 4.0; MSIE 5.5;
http://help.yahoo.com/help/us/ysearch/crawling/crawling-02.html
==== Yahoo Multimedia Search ====
Yahoo-MMAudVid/1.0 (mms dash mmaudvidcrawler dash support at yahoo dash
inc dot com)
==== Yahoo Product Search ====
YahooSeeker/1.0 (compatible; Mozilla 4.0; MSIE 5.5;
http://help.yahoo.com/help/us/shop/merchant/)
==== Yahoo Product Search ====
YahooSeeker/1.0 (compatible; Mozilla 4.0; MSIE 5.5;
http://search.yahoo.com/yahooseeker.html)
==== Yahoo Product Search ====
YahooSeeker/1.1 (compatible; Mozilla 4.0; MSIE 5.5;
http://help.yahoo.com/help/us/shop/merchant/)
==== Ask/Teoma Search ====
Mozilla/2.0 (compatible; Ask Jeeves)
==== Ask/Teoma Search ====
Mozilla/2.0 (compatible; Ask Jeeves/Teoma)
==== Ask/Teoma Search ====
Mozilla/2.0 (compatible; Ask Jeeves/Teoma;
http://about.ask.com/en/docs/about/webmasters.shtml)
====== Common Robot Traps ======
* Input forms
* Session IDs in URL
* Pages Restricted by Cookies
* Frames
* Logins
====== Robots.txt Syntax ======
User-agent: *
Disallow: /privatefolder
Disallow: /privatefile.html
User-agent: Googlebot/2.1
Disallow: /nogoogle.html
Sitemap: http://www.mysite.com/sitemap.xml
====== Robots Meta Tag ======
<meta name="ROBOT NAME" content="ARGUMENTS" />
ROBOT NAME can be either "robots" for all robots or the user-agent of a
specific robot.
See the robot user-agent list.
====== Sitemap Syntax ======
<?xml version ="1.0" encoding='UTF-8'?>
<urlset xmins='http://www.sitemaps.org/schemas/sitemap/0.9'>
<url>
<loc>http://www.mysite.com</loc>
<lastmod>1987-05-25</lastmod>
<changefreq>monthly</changefreq>
<priority>0.8</priority>
</url>
</urlset>
==== Default Locations Search Engines Look for Sitemaps ====
http://www.mysite.com/sitemap.xml
http://www.mysite.com/sitemap.xml.gz
http://www.mysite.com/sitemap.gz
Visit http://www.xml-sitemaps.com/ for a free sitemap
