A posse ad esse, from possibilty to actuality with Dreamweaver
Every HTML page can contain special HTTP header information. This information is used by the browser in the client computer or by the server computer to perform a variety of tasks, or to pass additional information back and forth between servers.
The <meta /> element allows you to include additional HTTP header information about the document. This element is placed in the <head> section of the document.
This attribute is used to include other types of non-header information (such as the author, a description of the document, copyright information, keywords, and so on) in the document. Search engines usually look for the following names: author, copyright, description, and keywords. Other possible names are generator, progid, robots, and template.
Identifies the author of the document.
<meta name="author" content="Your Name" />An unqualified copyright statement.
<meta name="copyright" content="Copyright description" />
for the USA and Canada include copyright © symbol and date, for the rest of the world, All Rights Reserved (Most countries no longer require this, but include it anyway)
This describes the document in the browser window. This is used by some
search engines to provide a document description to the users performing searches.
<meta name="description" content="A very exact description that includes "$10 words"" />
A comma-separated list of keywords used by search engines to index the document.
<meta name="keywords" content="planetarium, shows, production" />
You can use Dreamweaver to insert your Meta tags

and fill out the editor

Yahoo Search Marketing
--Follow these steps to get to Yahoo's keyword
research tool. When you click on the link, you will get to a page that
says: "Start Advertising with Yahoo! Search Marketing in 5 Simple
Steps."
On the right side, select your "market" and "time zone," then click on "Get Started."
You will see Yahoo say:
"1. Target Customers by
Geographic Location."
Leave everything as is and click on "Next:
Keywords." You now have access to Yahoo's keyword tool.
There's no need
to register further. Copy your keywords when finished and close the
window.
SEO
Tools Keyword Search
A Web Site devoted to SEO
SEO Chat
More Tools for the Webmaster
Google
Webmaster Central
Ever wonder what your web page looks like in other browsers?
This web site "Browser Shots" makes snapshots of what your web page
looks like in other browsers
"Browser Shots" http://browsershots.org/
Adobe has started a new browser testing service called, Browser Labs.
Check the web site out, and sign on!
https://browserlab.adobe.com/index.html#
Clean up and fix your your web pages with HTML Tidy
If you need to convert a page to Xhtml or you are having trouble getting the page to look the way you want it, Tidy may help you solve your problems
W3C Validation ServiceWhere am I?
Where have I been?
Where can I go?
Here's a Checklist of Design Tips from the Web Site "Usability" by Larisa Thomason, Senior Web Analyst, NetMechanic, Inc.
Here's a tip from Steve Krug, author of "Don't Make Me Think"
"If you really want to know if your Web site works, ask
your next door neighbor to try using it, while you watch.
(You bring the beer.)" http://www.sensible.com/
Usability First
a web site devoted to usability issues
Government usability guide
http://www.usability.gov/pdfs/guidelines.html