Damn writer's block

Why does this always happen to me? Whether it's a paper, a report, or my thesis, whenever I'm so close to the end I get writer's block. For my thesis I have about four pages of general conclusions left to write and I'm stuck. My main problem is I don't want to be repetitive. My thesis chapters are written as papers so each chapter has it's own conclusion; however, the thesis needs it own general conclusion. Every time I write something in the general conclusions I realize I've already said that in some other chapter. It's getting really annoying. Yesterday I tried the theory of just write even if it's crap. That usually works for me but this time not so much. I re-read that page today and it is not good. I just want to get these last few pages done but it's agonizing!

On a related note, my supervisor still is skirting the issue with respect to setting a defense date and an external examiner. I think that is contributing to my lack of effort in finishing the last few pages of my thesis. In my mind, I wonder why I'm putting so much effort in when he wants to put off my defense for months. I will spare you my endless complaints about my supervisor and defending because I could go on forever. The short version is that I'm sick of him prolonging and dragging this out so I'm going to talk to the chair of my department about my options. We'll see how that goes. This is the main reason I haven't updated my blog lately. I've been very bitter and as my mother always says, "If you don't have something nice to say, don't say anything at all". I'm still bitter but I've managed to rein it in somewhat to appear cheery on the outside.