For me, bad blocks were a symtom of avoidance behaviors that I had to correct. The longer I would run from situations, the worse my speech would become. For example, for the longest time I would avoid the phone and when I would finally be forced to use the phone I would block really bad. I corrected this by tackling the problem head on, actively making phone calls to stores, just asking for a certain item price or whatever. Fast forward a few years and now I have to talk on the phone all the time. I still stutter from time to time, but don't get the long blocks anymore because it not that big of a deal anymore. What I am saying is in order to beat stuttering, or at least get it to a manageable level, you need to push your comfort zones. "Feel the fear and do it anyway." It will get easier and easier and you will have less and less tension. Shorter and less blocks. I find it helps to take a deep breath before I'm going to speak, to "stutter forward" if I am stuck on a word. For example, if I am stuck on the world Management, I might speak it like Mah-Anagement... Just get to the next sound and keep moving forward.