This page will link the DBA day to day (dtd) activities and scripts to refer back, some environment does not allow copy and past between servers.
Find latest SQL server backup from history.
Drive space check SQL server steps and scripts.
Backup restore steps using T-SQL.
Load SQL error log to table for a quick read.
Topics and Concepts:
Basics for freshers
SQL server internal architecture for freshers
Understanding SQL server recovery models and backup types