The process of problem solving a complicated problem you'll need to gather information, create a hypothesis, narrow the focus, break it down to small pieces, and document the problem.
A feedback loop is the concept of confirming the problem, testing a hypothesis and gather the results and repeat as much as you need to.
There are ways to utilize a search engine using a + or - signs to include or exclude certain keywords from the search results.
Keep an eye out for answer sites like Stack Overflow or a well written blog posts. Sometimes you can get some useful stuff on forums and forum posts. Documentation can help a lot but lacks the context to utilize it.
Sometimes you'll have to work with cookies depending on if you're working with older browsers.
Sass Essential Training
Chapter 1
Sass is pre-processing language that expands CSS usage. You can integrate variables, nest of any group of CSS elements, perform operatiors, and integrate mixins.