In light of some discussions I've been having with 4tlas in the Zelda video thread about the merits of basic, but careful play, I wanted to share a somewhat unusual training exercise. On occasion, when I play friendlies, I'll challenge myself to deliberately avoid using the L button (which I use for all of my WDs, WLs, and L-cancels). It forces me to focus more on timing and spacing things correctly in the first place, since whiffs are more dangerous without these movement options, and it increases my reliance on reads, observation, and situational awareness to make up the tech skill gap. It makes me consider every place where a WD/WL would assist my gameplay, and shows me why they would be good options in the situations that I identify. Most of all, it helps me find mistakes that are otherwise hidden under the guise of high APM. I always find that I learn something new when I do this, and it makes me a stronger player for it when I finally re-integrate my tech skill.
tl;dr, I sometimes do a weird training exercise in friendlies where I try to find holes in my fundamentals by completely removing ATs from my gameplay for brief periods of time.