If you use wordpress for your blog then these few plugins might come in very handy.
Akismet checks your comments against the Akismet Web service to see if they look like spam or not and lets you review the spam it catches under your blog’s “Comments” admin screen.
All in One SEO Pack Optimizes your WordPress blog for SEO (Search Engine Optimization).
3) WP SMUSH
WP Smush strips hidden, bulky information from your images, reducing the file size without losing quality. The faster your site loads, the more Google, Bing, Yahoo and other search engines will like it.
The only WordPress Performance Optimization (WPO) framework; designed to improve user experience and page speed.
Recommended by web hosts like: Page.ly, Synthesis, DreamHost, MediaTemple, Go Daddy, Host Gator and countless more.
Shareaholic is an all-in-one content amplification and monetization platform, that includes related content recommendations, promoted content, social sharing, following, site monetization apps such as affiliate linking, and social analytics. This module makes it a snap for any website — big or small — to engage and grow their traffic, market their content, gain insights, and monetize their traffic, all from one powerful but easy-to-use dashboard.
OptinMonster comes with an easy to use form builder that allows you to create beautiful optin forms that are proven to convert. You can create various type of optins including WordPress popups, floating header and footer bars, slide-ins also known as scroll triggered boxes, sidebar forms, after post forms, in-line forms, mobile-specific forms, and more.
As the name implies, this social sharing plugin is simple and loads pretty fast. The buttons do not rely on external resources to load, it’s written in PHP, HTML and CSS.
Also read : How to Track Goo.gl URL Analytics