Leisure is time for doing useful.(essay)

When we are free usually we don't spend it in a productive way. For example, we can start watching TV or playing video games. This is because many people are lazy. Of course, maybe they just want to relax. 
I think though that leisure is a time to do something useful. This is for example learning a new language, reading a book, or learning something new in general. I think we should not waste time. Procrastination is not good. 
I recommend my friends to do something useful in their leisure time as well. I try to encourage them. 
Sometimes though I feel that we should just relax. Relaxing can give use energy so we can do something useful or productive another time. 
Because of this I think a balance is important.