Now the day on which Jesus had made the mud and opened the man’s eyes was a Sabbath.
(John 9:14)

We learn through scripture, that although the Sabbath is a holy day and a day of rest, we should still use our common sense as to what is acceptable behavior on the Sabbath.  Jesus "worked" on the Sabbath in the above scripture, but He was helping a man to restore his eyesight.  I think that if your action is God-pleasing, it really doesn't matter if it's done on the Sabbath as long as it glorifies God.  As always, it goes back to the heart of the deed and the motive behind your action.

Remember the Sabbath day by keeping it holy.
(Exodus 20:8)

I find myself being confused as to what is an acceptable activity on Sunday and what is unacceptable.  Recently, I read a quote from a commentary that Sunday should be "a welcomed rest in remembrance of God."  This gave me a little clarification about using Sundays for God honoring purposes.  I'm realistic enough to know that I'm not going to spend the entire day reading my Bible and/or praying.  That would certainly be God-honoring, but not practical for my personality and my nature.  I can make the effort not to shop, not to mow the yard, and not do those other chores that can be done on another day of the week. 
I'm going to quit over analyzing proper Sunday activities and just enjoy the day that God has blessed me with by honoring Him (as much as possible) with my thoughts and actions.....simple as that.