Adding few more points:
1) Disable comments, RSS,Pingback if not necessary.
2) Optimize your .htaccess file for speed up the cache. headers, compression, server side tweaks.
3) Tweak the php.ini file with increasing memory, post size, upload size
4) use CDN such as MaxCDN, Cloudflare
5) Use the right plugins for optimize the performance ( WP Super cache, WTC,etc)
Thanks for sharing these tips and your Wordpress Performance Optimization Tips post here. It's a very informative post, It's really helpful for the beginners.
You're not going to master the rest of your life in one day. Don't stress. Master the day. Make this a daily reminder.
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