Below is a working example of a pretty decent htaccess setup that should be suitable for most cases.

    RewriteEngine On
    RewriteCond %{HTTP_HOST} ^www\.(.*)
    RewriteRule ^.*$ https://%1/$1 [R=301,L]

    RewriteCond %{HTTPS} off
    RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R,L]

    <ifmodule mod_deflate.c>
    <ifmodule mod_mime.c>   
    Addtype font/opentype .otf
    Addtype font/eot .eot
    Addtype font/truetype .ttf
    </ifmodule>
    AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css application/x-javascript application/javascript text/text font/opentype font/truetype font/eot
    </ifmodule>
    #End Gzip

    <FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$">
    Header set Cache-Control "max-age=604800, public"
    </FilesMatch>