Sunday is the most relaxing day of the week.. well at least it should be. I think that Sundays are great for just relaxing, getting organized and prepared for the week ahead. So if you're off work and just have the day to yourself you should take advantage of that.
Most times during the week we have very limited time to do the things we need or want to do like cleaning, watching movies, catching up on our favorite shows, readings, cooking breakfast or even sleeping in. Also, I think it's important for us to get some things squared away such as, catching up on sleep because we want to get rid of last week's clutter and stress in order to have a pretty clear mind for the week ahead. It's also important to have things squared away because each thing you get done is one less thing to worry about later because it's already taken care of.
Relaxing is really important if work or school usually has you stressed out. You want to make sure you're doing things to help you wind down even throughout the week because stress can have some pretty bad effects over a long period of time. So by all means do stuff go for a walk, sleep, eat, watch tv, catch up with friends, read a book or get organized for the week. Do stuff that makes you happy.
just something to consider