What is it that we do in life?? we live. Some things we do automatically like education, work, careers may be marriage and constructing a family. Other things we do by our own choice. The problem is that you are always taken away by the basic things you started doing in your life thinking these are the only essential things you do not needing any other, and then - after it's too late - you find out that you should have done these things while you had the chance.
Whatever you feel like doing just go ahead and do it as soon as possible. Whether it's a trip, something new you want to learn or experience, a book to read, feelings you want to express - just about anything. If you want to do it alone just do it alone, if not then find someone you love to share with you that experience. Feed your soul from time to time, not only your body or brain. When your soul is full you are happy and it will reflect you and those who surround you in every aspect you can imagine.
Whatever you want to do just do it, if you can't now just add it to your bucket-list assuring yourself you are going to :)