.htaccess question/opinion/advice needed

[Eblan]

Hello,

I am trying to achieve 3 different things on my .htaccess I just want to make sure I am doing it the right or best way because I don't have much experience working on this kind of files.

I am trying to:

a) Redirect www.mysite.com/index.html to www.mysite.com so I don't get a duplicate content/tag error.

b) Redirect mysite.com to www.mysite.com

c) Get rid of the file extensions; www.mysite.com/stuff.html to www.mysite.com/stuff

This is the code that I'm currently using and it seems to work fine, however I would like someone with experience to take a look so I can avoid internal server errors and other kinds of issues. I grabbed each piece of code from different posts and tutorials.

Options +FollowSymlinks            
RewriteEngine on

Index Rewrite                                                                                                                 RewriteRule ^index.(htm|html|php) http://www.mysite.com/ [R=301,L]                 RewriteRule ^(.*)/index.(htm|html|php) http://www.mysite.com/$1/ [R=301,L]

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.html -f
RewriteRule ^(.*)$ $1.html

Options +FollowSymlinks
RewriteEngine on
Rewritecond %{http_host} ^mysite.com [nc]
Rewriterule ^(.*)$ http://www.mysite.com/$1 [r=301,nc]

Thanks a lot!