Take acid and go to crazy festivals if you want to stay young. No really, do it once at least. You need to bathe in youth from time to time in order to experience it - it's fantastic. Of course you need to keep up to date, try to use your wisdom to understand which technology/language is going to survive the test of time. For example, C/C++ is going to stick around for a while; make sure you're up to date (C++ 14 and…
Wanted to call that one out, don't think I've thought about it before, but it's good advice.