Three pieces of advice:
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The Noob to Pro Wikibook (as previously mentioned). Also - it’s very important as a new user to keep a list of keyboard shortcuts next to your computer. By the time the list starts to get unmanageably long (Blender has a ton of shorctuts), you’ll probably know them well enough to ditch the list. Blender was designed for use with one hand on the keyboard and one on the mouse (though I prefer my wacom). Take advantage of this, and you’ll be amazed how fast Blender can be.
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Pick a project. This will allow you to practice the skills you have, and give you reasons to look up (and then implement) new skills. To help with this, I often would just skim tutorial lists, the API, threads in this forum, etc. Doing this allowed me to relate exact feature names with their general function so when I didn’t know how to do something, I already had some keywords for the feature of Blender which might do it.
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Recognize Blender’s learning curve. Although it’s gotten a lot better since I started, new users should recognize it can be hard at first, but once you get the hang of things… learning a new feature is trivial.