Hey, that's what I do too! I've never read anything meditation-related and consequently do not know any of those approaches but I once realized that lying in bed/on the couch/on the floor for a few minutes while freeing my head of all thoughts really helps with mental fog (I have ADHD and fog tends to build up even with meds). I tend to jokingly refer to the process as 'clearing my cache'.
Happy to see this concept references here!! I've started thinking about a lot more things in my life in terms of greasing the groove, IE: how can I make the healthy things convenient and the unhealthy things inconvenient? I want to be lazy with my willpower when I can.
I often employ it in work too, picking one of the most minor thing I have on the to-do while having morning coffee and three hours later realize I have been grinding away non-stop.
I bet some Zen master would reprimand me for this being the wrong approach, but I found it quite difficult to get into the habit of doing, say, a single 30-60 minute session per day. Now I can consistently drop into the meditation session with no urge for procrastination and have also successfully experimented with longer ones.
[1] refers to the method of increasing your pull-up capability by installing a pull-up bar in your office / bedroom doorway and doing a set every time you pass through the doorway