Dealing With Overwhelm

How does one deal with overwhelm? I have not even listed everything in my to-do list. Yet, the listed ones are not even completed. The day is almost over. So, what is the best thing to spend the 2-3 hours left in the day. Think! Then, just do. It’s not a matter of getting everything done. Just get some done so you can check them off. That is still better than sitting and doing nothing and feeling helpless, powerless, and inadequate. It’s not going to get better but at least you still knock off some stuff.