Ive had similar dread for quite many years in the past, luckily recently it has faded away a lot.
I have a few things that worked for me:
- Put everything ready for the morning before you go to bed. Pack your bag, prepeare your lunch, set all your tomorrow's clothes somewhere nearby, etc.
- Get up a but earlier and set yourself a bit of time to relax before the day starts. Its like a slot of time between sleep and actually starting your day tomorrow and your mind will be more restful in the evening. Maybe exercise in the morning would be great too but i personally have never been able to bother, but i imagine it has a much stronger effect
- Stay active during the day. I think the best activity is to hang out with your friends, do some exercise, take a walk, read, do yoga, etc.. Generally just anything but staying home alone, doing nothing and thinking about tomorrow
- Be mindful and try your hardest to stop yourself from overanalyzing. I always remind myself that whatever i have ever been overanalyzing, has actually never happened the way that i thought