Any good developer needs to know some basic shortcuts on the IDE using in order to speed up the development process. In my case, this are the ones that I use the most and some times forget when I stop using IntelliJ for a while.
Complete Statement action (autocomplete semicolons, etc) -> Ctrl+Shift+Enter
Search for any text in the whole project -> Ctrl+Shift+F
Find usages -> Either hold control and hit the word or select it and ctrl+alt+F7
Fidn Classes, Files, symbols and actions -> Shift Shift
Show file in file explorer -> Alt+F1, then select Project view