I spent a lot of time on my back door step. Just getting fresh air and any sunshine available, when actually going out felt too overwhelming. I still do sit on it in moments of anxiety and it calms me. I also played little games on my phone, repetitive ones that didn't require a whole lot of thought.
I lived off cereal bars a lot, they didn't seem too daunting and I felt I could manage them. Grapes were good in terms of being small and manageable. Bananas for energy. I tried to sip water throughout the day.
At night time I listened to a hypnosis app, from Mindifi. It's free to download and one of the tracks is free to listen to. I found it really helped me fall asleep and I still use it when I find I'm starting to lose my sleep pattern.
When I was able to go out for walks with my dog, I made sure to take at least one picture, of something I found appealing. When I first starting taking the dog for walks, i would literally walk with my head down, staring at my feet as looking around made me anxious.
I tried to watch silly light hearted things. Silly animal videos on YouTube for example. I avoided any music, films etc that provoked deep emotion. Didn't watch or read the news.
These things helped me and some days were better than others.