One very useful characteristic of WordPress is that it has a large, active online community. Everything you will ever need for your WordPress website can be found online, and probably for free.
As WordPress is always actively developed, it's important to keep yourself up-to-date with the software community about their latest activities. The most important spot to visit or subscribe to is WordPress Releases: http://wordpress.org/development/category/releases/. Whenever there is a new release — be it a major release, or an interim bug fix, or an upgrade — it will be here.
Also, be sure to stay tuned to the main WordPress blog at http://wordpress.org/development/.
The WordPress Codex ...