Most IT people are self taught. These are things that I needed to learn and these are the tutorials that I created to help me learn.
Core language structures and basics
Programming principles and theory
Methods and operations
UI elements and patterns
Page structure and positioning
Visual styling and aesthetics
Common programming solutions
Data and code organization
Clearing the browser cache for just one page without nuking everything
Changing the DNS Hosts File to prepare for a new domain
Quickly find the IP address of a website
Modifying .htaccess settings
Checking for SSL certificate mismatches
Modifying PHP configuration settings via ini.php
Setting up email rules