Get good sleep. Eat well. Don't drink and expect to be productive. See a therapist. Exercise. Get fresh air. Take allergy medication if you need it. There's a

Get good sleep. Eat well. Don't drink and expect to be productive. See a therapist. Exercise. Get fresh air. Take allergy medication if you need it. There's a lot of wonderful techniques and software out there but the most important optimization is the foundation of good health, mental and physical. My memory has improved so much with consistent sleep. A plant based carb light diet helps so much with energy and focus. Then take some time to consistently study a little. I've started setting a daily calendar event to read a book. Don't worry too much if you're not focused these days. It's a pretty stressful moment in time.