Are you T1 or T2? I was specifically talking about T2s; testing multiple times a day can be useful to get a sense of daily patterns, but those patterns will tend to persist from one month to the next so there's no need to test many times a day every day.
I'm T2. I use the levels to make small adjustments throughout the day.
Some examples: In the morning I go for a cycle, I use the levels to decide what distance to do and also during the ride to ensure I don't hypo (I'll eat some fruit if my levels are getting too close to 70). After lunch I go for a walk, depending on how my level is looking it will either be 3km or 5km. In the evening I generally check my level about 10pm, if it's looking too high then I'll add an additional walk in.
There are many other details where I use my levels to adjust my behaviour, at this point it's all automatic but I couldn't do it without knowing what my level is at any point in time (needless to say I'll be queuing outside the Apple store if they do actually release an Apple Watch with a glucose monitor).
