Have you ever burned a bridge at work?

I haven't, and I'm starting to think that might not be such a good thing. People who look out for themselves seem to be the ones who get ahead quicker. A few months after I lost my job, I got a freelance gig in the research department at a wedding magazine. I knew the work would be tedious, but with no other prospects in sight, I happily accepted it. About two weeks later, I got an email from an editor at a newspaper offering me a full-time freelance job that basically required playing matchmaker to all the singles in NYC. Hello, fun job! I was bursting with excitement until I realized, shit, I already had a job. 

I tried to figure out a way to do both, but it just wasn't working out. And even though I didn't sign a contract with the first job, I just couldn't find it in myself to quit after I had already started. Is everyone thinking I'm a total idiot right now? Probably. I went from having to choose between two jobs to not even having ONE. Sweet. Will being a nice, honest person ever get me anywhere? It doesn't feel like it. But, I just don't know how to be anything or anyone other than who I am. For better or worse. 

It's hard for me not to look back and wish I had made a different decision. However, I do believe in all the cliches about how everything happens for a reason, so I'm just gonna go with that. What choice do I have anyway? Plus, if I had taken the second job, I probably wouldn't be here writing to all of YOU on this very blog. 

So be honest here: Do you think I made the wrong decision? Have you ever been in a similar situation? And have you ever burned a bridge at work?