How can I kick my ambition in the butt?

I have to tell you I've been making art my whole life - I used to draw all the time, make little sculptures out of cheese wax off of Gouda and Edam cheeses, and make little animal sculptures out of walnuts, scraps and paints.  I sold my first piece in high school, was an art major in college and have always supplemented my income by doing commissions of various sorts.  But until recently I've never tried to make a living being an artist - oh I've thought about it but it always seemed like a lot of work.

I definitely have the talent (you can check out my website - http://www.amvidal.com/ - if you doubt me ) but I just don't seem to have the drive.  So this has been quite an experience for me trying to create this drive in myself.   It's not that I'm not ambitious since ambition is defined as a desire to achieve a particular end - I definitely have that.  What I don't seem to have is that fire in the belly everyone always talks about.  

As a result I find it hard to focus - if I don't have a commission or a show (I've had all of one) - I really have to push myself to do anything.  Oh the ideas are in my head but actualizing them is like pulling teeth sometimes.  I get distracted easily and procrastinate a lot most of the time and then other times things just flow out of me and I can get 5 pieces done in 3 days.

My art seems to just come from inside me so I can't just go commune with nature or go to a museum to get inspired.  I am friends with a lot of people who are artists in one way or another so talking to them and seeing what they are doing definitely helps but is it enough? 

How do I kick my ambition in the butt and turn it into that burning need to succeed?  I've never felt that fire in my belly, wanted anything so badly I could taste it, or any one of a million other metaphors and similes that means that I will push myself to get to where I'm going. 

I guess I'll just keep doing what I do - create when it hits me, focus on other things when it doesn't.  Try to develop a little bit of discipline to make something every day without having to plan ahead to have art days where I really focus on making things.   I've had a website of some sort for years but now I'm jumping on the social media bandwagon with a Facebook page and this blog.

Next stop - Imagekind, ETSY, and maybe even CafePress!!  But first I must get down to the bottom of the mystery of why my cat feels the need to dig in my bathroom wastepaper basket!!!! 

Cheers!