Now, coming to making best use of a Bandh day; here are some of my suggestions.
Catch up on some sleep.
Clean up and Back up your computer.
Clean up your home and Fix the broken stuff
Go for a walk
Update your Resume and look for a better job
There are other things like play cricket on the road and cook your favorite dish etc. I don't do either of them. Love to hear from you about anything special that you can think of.