1. Used slack's status to inform people when I am in the middle of a task so to imply that I will reply late. Disabled slack notifications and stopped using the slack app (instead had it as a pinned tab on the browser). I only replied if I am able to give it my 100% attention.
2. Via experimenting came across a fixed number of things I will do in a day based on priority. For any task that comes in either asked my reporting manager for it's priority or noted it down to be completed as part of the next day's tasks. There are always days when you are going to be overwhelmed by the things for you to do and it is okay to talk to your manager to have things taken off your pile.
3. Write down notes as much as possible about events related to work. It might be unstructured at first but try formatting it at the end of the day and slowly the ability to write good notes will kick in. This will also aid in identifying why you might have missed out a detail. It is an overhead to log summarized information down but it could do you good in the long run.
4. Slowly phase out and remove your rechecking time. It provides a safety cushion for your brain to slack off on the first run and even if you are careful, you might miss out on details during rechecking because your brain becomes used to what you have written. It is completely fine to ask for help from colleagues or your manager in case you are not sure.
Hope this helps you.
