1. Enable compression
2. Leverage browser caching

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews
    </IfModule>

    # Enable Compression
    <IfModule mod_deflate.c>
        AddOutputFilterByType DEFLATE application/javascript
        AddOutputFilterByType DEFLATE application/rss+xml
        AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
        AddOutputFilterByType DEFLATE application/x-font
        AddOutputFilterByType DEFLATE application/x-font-opentype
        AddOutputFilterByType DEFLATE application/x-font-otf
        AddOutputFilterByType DEFLATE application/x-font-truetype
        AddOutputFilterByType DEFLATE application/x-font-ttf
        AddOutputFilterByType DEFLATE application/x-javascript
        AddOutputFilterByType DEFLATE application/xhtml+xml
        AddOutputFilterByType DEFLATE application/xml
        AddOutputFilterByType DEFLATE font/opentype
        AddOutputFilterByType DEFLATE font/otf
        AddOutputFilterByType DEFLATE font/ttf
        AddOutputFilterByType DEFLATE image/svg+xml
        AddOutputFilterByType DEFLATE image/x-icon
        AddOutputFilterByType DEFLATE text/css
        AddOutputFilterByType DEFLATE text/html
        AddOutputFilterByType DEFLATE text/javascript
        AddOutputFilterByType DEFLATE text/plain
    </IfModule>

    <IfModule mod_gzip.c>
        mod_gzip_on Yes
        mod_gzip_dechunk Yes
        mod_gzip_item_include file .(html?|txt|css|js|php|pl)$
        mod_gzip_item_include handler ^cgi-script$
        mod_gzip_item_include mime ^text/.*
        mod_gzip_item_include mime ^application/x-javascript.*
        mod_gzip_item_exclude mime ^image/.*
        mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
    </IfModule>

    # Leverage Browser Caching
    <IfModule mod_expires.c>
        ExpiresActive On
        ExpiresByType image/jpg "access 1 year"
        ExpiresByType image/jpeg "access 1 year"
        ExpiresByType image/gif "access 1 year"
        ExpiresByType image/png "access 1 year"
        ExpiresByType text/css "access 1 month"
        ExpiresByType text/html "access 1 month"
        ExpiresByType application/pdf "access 1 month"
        ExpiresByType text/x-javascript "access 1 month"
        ExpiresByType application/x-shockwave-flash "access 1 month"
        ExpiresByType image/x-icon "access 1 year"
        ExpiresDefault "access 1 month"
    </IfModule>

    <IfModule mod_headers.c>
        <filesmatch "\.(ico|flv|jpg|jpeg|png|gif|css|swf)$">
            Header set Cache-Control "max-age=2678400, public"
        </filesmatch>
        <filesmatch "\.(html|htm)$">
            Header set Cache-Control "max-age=7200, private, must-revalidate"
        </filesmatch>
        <filesmatch "\.(pdf)$">
            Header set Cache-Control "max-age=86400, public"
        </filesmatch>
        <filesmatch "\.(js)$">
            Header set Cache-Control "max-age=2678400, private"
        </filesmatch>
    </IfModule>

    # BEGIN Turn ETags Off
    FileETag None
    # END Turn ETags Off

    RewriteEngine On

    # Block UserAgent libwww-perl
    RewriteCond %{HTTP_USER_AGENT} libwww-perl.*
    RewriteRule .* – [F,L]

    # Redirect IP to domain
    RewriteCond %{REMOTE_ADDR} ^xxx\.xxx\.xxx\.xxx
    RewriteRule (.*) http://yourdomain.com/$1 [R=301,L]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)/$ /$1 [L,R=301]

    # Redirect www to non-www
    RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
    RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

    # Redirect non-www to www
    # RewriteCond %{HTTP_HOST} !^www\.
    # RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]
</IfModule>