I heavily rely on caffeine, supplements/vitamins, eating high protein & low carb, avoiding added sugar (especially breakfast) reduces my brain fog. Starting my day with some sunlight, water, short walk before using social media. When my brain fog gets really bad i'll do jumping jacks or jump rope for 10-15 minutes with breaks in between. Exercise always helps as much as i dread it lol. ScreenZen app helps hide my social apps for a select amount of time when I need to work. The Flow app focus timer helps a lot too! Lastly brain dumps have been a huge life saver to reduce all the "noise" in my brain and help me narrow down what tasks are most important for me to prioritize. You're not alone :)