When my brain is functioning properly (according to third parties), this sounds like great advice, and I can even
intend to head it next time I sink.
However, once my brain was processing my every action as futile, I was often too depressed and incapacitated to shower, or even to get up and make food when I was hungry. In that state of mind, things like kayaking and hiking were functionally impossible. Music remained, but my brain retreated to the comfort of Radiohead's "Street Spirit" or "Creep" (etc).
My point is that it's almost like being a different person. Reality is persecution, logic is warped, and intentions from good days do not always carry over.
I was fortunate to have understanding and patient friends who helped me work on this during my good days. Kayaking is still unobtainable, but now I am able to turn to, e.g., "Katamari on the Rocks"[0] for music, and Alan Watts as well. The Zen Habits reminder to breathe [1] is a permanently open tab in my "distractions" group.
As the quote from Infinite Jest says[2], the flames become terrifying. I can only speak for my own terror, but the help and support I've received have made it easier to face and combat. Long talks with friends, smiles from strangers... it has all been important. Thank you.
[0] https://www.youtube.com/watch?v=SsB3IfttE50
[1] http://zenhabits.net/more/
[2] https://news.ycombinator.com/item?id=9501234