By creating, and creating, and a little more creating. To me, life is a little pointless if I'm not making something. It can be a little thing, a crochet square for a blanket that I'm working on, a paragraph of writing that may not even be very good. But if I haven't made at least one thing in each day then I feel as though that day has been a little wasted.
I also try to make sure that I do some smiling and laughing every day, and some gazing adoringly at my children. If I can't spend a little time with each of my three boys then I feel like I haven't used the day properly.
And I think that's the essence of my answer to you - each day has plenty of opportunities in it to do things that make us happy, and to make the people we love happy. They may only be little things, but when you add them up they become a huge and fulfilled and glorious life.