The WordPress system is upgraded fairly regularly. That’s a good thing, for a number of reasons. In addition to providing new features, upgrades address critical security issues and patch annoying bugs.
However, the only way to benefit from WordPress upgrades is to actually install them. Many hosting services even offer a simple one-click upgrade. If that’s the case, then there’s almost no reason why you should delay in upgrading when a new release is available.
Manual upgrades are also fairly easy (remember, WordPress is the blogging system that takes only five minutes to install). This video demonstrates the manual upgrade process and discusses some of the precautions you’ll want to take before you perform an upgrade.
If you’re following along at home, you’ll probably want to install the plugin below and backup your data before you begin:

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[...] visit here: wordpresstraining.com. · Best Practices for Upgrading WordPress › (Basic). · Upgrading WordPress ›. · Importing and Exporting Data › (Basic). · Managing WordPress Users › (Basic). · Managing [...]
[...] How to Upgrade WordPress (covers manual upgrades and includes demonstration of the backup plugin). [...]
When you talk about self-hosting… does that mean those of us with our site on our own in-house webserver?… or does this apply to anyone that is not hosted at WordPress.com?
Bonnie, Self-hosted is any web server where you’re responsible for installing and updating WordPress. That works out to be everything but WordPress.com