World Backup Day was last week, on March 31st.
Have a backup. In the world of software, losing work can range from mildly annoying to catastrophic. A backup can save you from that peril.
However, having a backup and finding out at the most critical time it is not viable is almost worse than having no backup at all. Verify your backups! This is often a forgotten step.
Backing up applies outside of software too. Have a backup plan for your meeting. Have a backup person to review your code. Have a backup lunch in the fridge in case your forget to pack your lunch.
This week make sure you have a backup plan and that the plan can be executed without fault.