6) Career Mobility

'Portability' means your skills work anywhere, not just at your current desk. Avoid becoming an expert in Internal Tools (software only your current company uses). Instead, master Industry Standards like AWS, Python, Salesforce, or SQL. Look at 5 job postings from other companies. If you can do 80% of what they are asking for, your skills are portable. If you only know how to do things 'the company way,' you are in a dangerous position if you ever get laid off.