The benefits of testing multiple times a day should be your most important reminder - better BG/A1c; feeling and looking better; less infections; etc…
I tend to test before and 2 hours after mealtimes as that is easiest for me to remember. I also test before getting in the car to drive (I am Type 1), working out or going out to parties or other events where my attention will be elsewhere.
If you already know that your sugars go out of control when you’re not being responsible about testing, then why would you “forget”? Mind you, I’ve been a Type 1 diabetic since the age of 12 and I refused to do finger-sticks for at least the first 5 years. So in the many years since then as I became an ADULT the importance of knowing my actual BG number got me over that hump.
Basically you have to be of the mind that YOU are in control of your health - you have to be the brains behind the pancreas that is either not working at all or not working very well to take control of your health. Get away from the mindset of yo-yo dieters who eat healthy & exercise to lose weight and then wonder why they gain it all back when they go back to what they were doing before they switched to doing everything healthy.
Keep the importance of well-controlled BG in mind: It is IMPORTANT not to damage your kidneys; it’s IMPORTANT to not damage the nerves in your feet or the tiny blood vessels in your eyes (I actually had this problem for a while until I got my A1c down). It’s IMPORTANT that you take care of your heart - it’s all related.
Sorry to be blunt but this is the same way I talk to a friend of mine - it’s for the good of your long-term health.