I have two big hurdles. One is that I often don't have a comfortable place to write. My desk is always messy, I don't like writing in bed, etc. This one can be resolved with a little planning, it's annoying but doable and having a place to write really helps with the second and more difficult hurdle:
The second hurdle is that I almost never actually want to write when it actually comes down to doing the actual writing. I'll clear my desk, set reminders on my phone, buy nice notebooks and pens, have good intentions and then I'll wake up in the morning, or get home in the evening, and I'll have to choose between writing and not writing. As of this post, not writing has won most of the contests. The thing that has worked best for me, even though I am far from consistent, is recognizing that I don't want to write, acknowledging the fact, and then making myself write anyway. Even if all I scribble down is "I don't want to write, I have nothing to say, I don't want to do this right now, this is stupid and sucks and why am I writing this drivel in a 35 goddamn dollar notebook" it still counts, and it builds the writing muscle.
Thus do we see the insidious power of the Song. /u/FenrirIII, in their arrogance, sought to turn the Song to their own purposes, in simple jest. But they were deceived, and enthralled, by the will of the Song. It consumed them, and, when their mind was broken, contrived to be put into a meme purporting to fight against the Song, while infecting the minds of all who looked upon it, forcing them to hear the song before its appointed hour. And all who hear it, having heard it once, are doomed to hear it echoed in their minds, never are they free of its taint. Beware such fools, and look not upon their creations, at least not with the sound on. And pity the ones who heed not the warnings.