Akismet– Prevents spam in comments; comes installed with your WordPress by default. Get an API Key to activate it.
All-in-One SEO – Add unique meta description, keywords, and titles to each page of your blog and blog posts.
W3 Total Cache – Makes copy of web page on server; increases site performance, reduces resource consumption.
WordPress Database Backup – Backup your blog’s database often. Set this process to be automated.