Hi, for me I found a food diary really helpful recording what you eat and the results from a glucometer before and two hours after.
My first couple of months was testing all my favourite foods, finding which ones I couldn't tolerate and those I could. Because I use intermittent fasting I only test a couple of times a day now, mainly if I'm having some food out and about or know that I have never had before.
Once you get used to testing, I have found it becomes less of a chore and is a completely normal thing for me to do.
I don't have the luxury of having treats, and I have been in Keto for around eight years now, except for a couple of blips!!
I know what I need to do to be healthy.