I have just found the cure to writer's block--write something else completely and, then, you write the next installment of your work in the other end. It might sound a bit tiring to you, but it worked for me. You see, I had been too lazy--I do not experience writer's block, just writer's laziness--to write my next installments to a fan fiction that I am working on; it's just pure laziness excruciation. What I did was to write something else entirely. See what other form I can do with the fandom. I've done it and it's still in the works. Now, I've just to write down the installments and we are home free.
Insanely me ;)