I am surprised that no one has mentioned consultation with a MENTOR.<p>Really, if you &quot;don&#x27;t know what you don&#x27;t know&quot;, you need some type of trusted guide who understands your aptitudes and motivations and can recommend a path of study or provide some clarity of thought.<p>There is absolutely nothing wrong with fumbling around in the dark and discovering stuff on your own, but if you&#x27;re asking this question, it means you&#x27;re resource-constrained and need some clear goals to work towards. This is where a mentor or at least a colleague can help out a lot. In addition to providing guidance, a mentor can critique and analyze the direction you&#x27;re taking.<p>&quot;Todo&quot; lists are perfectly fine tools for mastering some narrow focused topic or for achieving completion of a small project, but they&#x27;re not a strategic tool. Deciding what to learn next is very much a STRATEGIC question, and those kinds of decisions benefit greatly from dialog with an expert who cares about your success.