Below is a list of resources that I have used and recommend based on my experience. As things change and new options are available, I will update this page to reflect my latest recommendations.
Note that some of the links below are affiliate links. See the disclaimer if you have any questions.
WordPress Themes and Plugins
Hestia is the WP theme that this blog was built on. It is simple to use, but offers a lot of customization for a free theme.
Themeisle is the maker of the Hestia theme. If you like what Hestia offers, but need more features from a premium theme. They offer over 30+ themes and 10+ plugins.
Migration tool for all your blog data. Import or Export your blog content with a single click.
A Syntax Highlighter built in PHP and jQuery that supports customizable languages and themes.
Bring the power of the WordPress.com cloud to your self-hosted WordPress. Jetpack enables you to connect your blog to a WordPress.com account to use the powerful features normally only available to WordPress.com users.