SEO is changing day by day, even many says SEO is dead now. The Webmaster's who only did link building now has lot the game, the Webmasters who were willingly to give a greater user experience won the game. Here is one of my tips to reduce your website load time which is also known as one of the factors in Google rankings. Its Gzip compression, copy and paste this code in your htaccess file
php_flag zlib.output_compression On
php_value zlib.output_compression_level 5
<filesMatch "\.(js|css)$">
Header set Content-Encoding x-deflate
# Header set Content-Encoding compress
# Header set Content-Encoding x-gzip
</filesMatch>