I also need to control stress and insomnia, and whilst I have had a few fairly lame attempts at mindfulness meditation per se, I do feel it's a good approach, it's just that I'm rubbish at doing it consciously. However, doing things that absolutely demand focus is one way of forcing it. I choose motorcycling, martial arts and straight razor shaving (and even stropping) as ways of 'living in the moment'. There's nothing like an unguarded razor at your throat to grab your concentration LOL! In fact, this and some 'self care' during lockdown were exactly what brought me to finally get round to taking up straight razor shaving. Ultimately that is why I joined TSR - to learn how to do it properly without unintentionally bleeding out! It is also great to dip into the wealth of knowledge and share stuff like this with like-minded guys. I'm grateful for this forum's existence and the support from the lads.
I don't consciously 'use the shaving time to practice meditation' as such, I just get that blade to my face and concentrate on getting angles, stroke length, lack of pressure, etc right, and have an awareness of the sound of the stubble being cut, the grain direction, lather coverage, slickness, scent etc. This pretty much IS being present in the moment.
Often if I can't sleep I'll read some sci-fi or other fiction to disconnect from thinking about work. Good luck fella, this stuff is affecting more people more than ever since lockdown etc I believe.