Thanks Victor, I find this information which you just shared useful too. Personally for me, I normally experience writing block when I have to write boring stuff such as a job application cover letter, or any subject which I don't know well enough.
My personal approach to overcoming writing block is to just keep writing what I know about, in order to keep ideas flowing in - while this can be distracted/interrupted at times by the need to complete another activity, or getting caught up by researching for info to fill up some gaps in the story.