So pretend you have a passion to do something. I my case it's easy to pretend, because I have a passion for writing. Ever since age 16 I've known that I want to write for a living. First it was as a newspaper reporter, then as a marketing writer.
Being a writer is not what I do, it's what I AM. It's virtually impossible for me to go two days without writing. I can't remember the last time I did. When people ask me what I do for a living, I love to say "I'm a writer." Lucky for me there are a fair number of jobs out there for writers -- and blogs like this where I can chase the verbal dragon -- so the odds are good I can continue to get my fix.
Now pretend your passion is for driving a race car. And everything I described about myself as a writer applied to you, only as a race car driver.