These are the plugins I use, and which I also recommend you to install on your WordPress blog:
[By alphabetical order]
- Ad Inserter
- Akismet Anti-Spam
- Breadcrumb NavXT
- Coming Soon Page, Under Construction & Maintenance Mode by SeedProd
- Display Posts, by Bill Erickson (Guide to install it and customize it with CSS)
- Jetpack by WordPress.com
- VaultPress
- WP Super Cache
- Yoast SEO