301 redirection code suggestions please

Selected answers from the Dumb SEO Questions Facebook & G+ community.

• 
  Atish Hemade: 301 redirection code suggestions please.. in .htaccess file
  HTML TO SHTML
  www.example.com/test.html to www.example.com/test.shtml
• 
  Mark Steenbakkers: +Atish Hemade why do you need the .shtml file extension? If you want to make you website user friendly, I would suggest that you remove the file extension in an url.
  
  Here are both options:
  
  RewriteEngine on
  RewriteRule ^(.*).shtml$ $1.html [nc] (rewrite .html to .shtml)
  RewriteRule ^([^.]+)$ $1.shtml [NC,L] (remove the file extension)
• 
  PromozSEO: I agree with +Mark Steenbakkers. You can completely remove the extension part from all your URLs with the .htaccess file.
  
  RewriteEngine On
  RewriteRule ^([^/.]+)$ $1.shtml [L]
  
  Redirect with .htaccess
  
  Redirect 301 /test.html http://www.example.com/test.shtml
• 
  Datafeedware: use this one ;RewriteEngine On RewriteRule ^([^/.]+)$ $1.shtml [L]