What are some useful ways to spend in this lockdown?

Answer 1

Improving your tolerance for booze and learning how to consume a large pizza with everything in one sitting!

Answer 2

What lockdown?  I have gone out ever day this whole time.  That includes shops and Restaurants.. 

Answer 3

Cook, binge watch a series, read a book, take a walk where there are no people, e-mail your friends.