It's simple:
Non-existence is an undeniable fact.
Always remember that your lifetime is short, and can end at any moment without warning.
Know what you need to achieve on this lifetime.
Find which of these goals are the dearest to you.
Figure out how you can reach said goals.
Desperately work on achieving them on every chance you get.
However, keep a calm and collected exterior.
Sever all the ties that prevent you from reaching your goals.
Always be in control.
You are your own savior.