Learn how to learn new things. Learn how not to get stagnated. Learn how not to be afraid to leave the comfortable. Practice these things and you'll be good for the next 50-100 years.
This is what I was going to say. Basically, learn to be intellectually agile, ready to accept new ideas, and be good at getting up to speed quickly with new things.
Want to learn a language? Take a weekend with it, write something that's useful (even if not suitable for production or long term use). Do that often enough and you'll be mentally agile enough to pick up anything when you need to.
Want to learn a language? Take a weekend with it, write something that's useful (even if not suitable for production or long term use). Do that often enough and you'll be mentally agile enough to pick up anything when you need to.