There are a number of ways to redirect pages for one reason or the other. I will list the most common ones.

Meta refresh: add this line to the header of your html document to redirect your page to another location:

<META HTTP-EQUIV=REFRESH CONTENT="0; URL=http://www.newlocation.com">

Another simple way of redirecting would be with a javascript in the header of your page:

<SCRIPT LANGUAGE="JavaScript">
<!-- window.location="http://www.yourdomain.com/"; // -->
</script>

Both ways will work, however if your looking for a better solution and one that is accepted by the search engines you should go for a 301 permanent redirect, here are some good ways of redirecting.

301 redirect using .htaccess:

RewriteCond %{HTTP_HOST} ^www.mysite.com
RewriteRule (.*) http://mysite.com/$1 [R=301,L]

If you'd like to redirect single files or directories add this to your .htaccess:

Redirect permanent /olddir/ http://www.mysite.com/newdir/

301 redirect using a PHP script:

<?php
if ($_SERVER['HTTP_HOST'] == "www.mysite.com") {
header("HTTP/1.1 301 Moved Permanently");
header("Location: http://mysite.com".$_SERVER['REQUEST_URI']);
exit; }
?>

301 redirect using a ASP script:

<%
Response.Status = "301 Moved Permanently"
Response.AddHeader "Location", "http://www.mysite-new.com"
_
& Request.ServerVariables("SCRIPT_NAME") _
& "?" & Request.ServerVariables("QUERY_STRING")
Response.End
%>

301 redirect using a Perl script:

print "Status: 301 Moved Permanently\r\n" .
"Location: http://www.mysite-new.com" .
"$ENV{'SCRIPT_NAME'}?$ENV{'QUERY_STRING'}\r\n" .
"\r\n";