I find building the habit has really helped me. My days are wildly variable in stress levels (some days are basically zero stress, others are tension headache inducing). What I’ve found that works for me is getting on the bike, no matter what. Some days I’m just not ready for VO2/O-U or whatever, so I swap out that workout for 30m at z2.
Once the habit becomes ingrained, it makes it easier to get on the bike and do something. I used to hate doing a workout on Fridays, but after 8 weeks, it’s just part of my day, so if I’ve missed out an intensity day in the week because of work stress, the habit pushes me to get on and do the work.
I’m on the LV plan, but ride 6 days a week, nailing the LV workouts and adding something (anything!) the other three days. That way, if Tuesday is a bad day to do the workout, I still have the habit of subbing an easy day (to keep the habit), and picking up the hard workout on a day that works for me.