I'm not always on top of things but thanks for this thread OP as it has helped me think I need to get on top of some silly little things that are needlessly adding to my anxiety. I'm on the autistic spectrum and have struggled with chronic and often severe anxiety disorders since childhood but I do have some coping mechanisms that help me, although I do take the odd diazepam when things are uncontrollable.
Getting busy with something else helps if I have the energy. I do cleaning sometimes like another PP said, I find that helps and I get stressed and anxious when the house gets messy, I feel much calmer when things are clean and tidy and organised!
I don't do nearly enough exercise as I should, but I have chronic pain problems with my back and knees, so I do try to make some time out for a few strengthening exercises for these areas, and some stretching at home. I have invested in a really good quality yoga mat which helps to motivate myself. I find concentrating on counting when I stretch or the reps I do in exercises helps me.
I also once was in counselling for about 9 months, weekly sessions with a therapist that I got a great connection with and that really helped too gradually. I doubt I will ever forget her. Though that was when my anxiety disorder was so bad that I couldn't leave the house on my own most of the time so a different kettle of fish like.
I get up a bit earlier in the mornings than I strictly need to as otherwise if I'm rushing about everywhere I feel more stressed and anxious. This way I don't have to rush, I spend about 25 mins eating my cereal for breakfast with a cuppa and watching some of BBC Breakfast. Find that helps. I also try to pick my outfit and pack my bag for work the night before. I've lost my way with this one a bit but will try again for next week as it does help with stress and time on a morning.
I have noise-cancelling headphones which help me with sensory inputs when I'm out as that's an anxiety trigger for me being autistic, I am listening to a long series of historical podcasts on my way to and from work with them which helps me not worry about what I've got to do at work on my way there and helps me quickly switch off from work on my way back.
I try not to think about work outside of work. If I catch myself thinking about it I immediately tell myself 'no - stop -' and change my train of thought to something else. I will continue to do this on and on if thoughts reoccur for awhile. My job is not high-stress though and there's really absolutely no need for me to think about it outside of work.
I also go to bed early-ish and almost always get at least 8 hours sleep a night. I am one of those people who needs loads of sleep and get very tired and irritable and stressed when I'm tired.
I have two guinea pigs who keep me happy and occupied too and having a cuddle with them is a great stress reliever and always cheers me up if I feel sad.
I try and eat well too. My diet is not the best but I do eat a fair amount of veg and I always eat three good meals a day plus snacks and am a healthy weight.