I have a great boss. She's an advocate, she empowers me to do my job in the way that I think it should be done, she trusts that I'll follow through on my commitments, and she's interested in my professional growth. She also says "No" to me sometimes, which I hate hearing (of course), and can lead us to conflict. 

So what do you do when your boss says no? When you are SURE that your plan is going to work and they stand in your way? How do you move forward with someone who's first response is to stop you in your tracks? And what if your boss, (unlike mine), is just plain obstinate and unreasonable?