The Bible is full of examples of what the Israelites could NOT do on the Sabbath and today we often think of Sunday in those terms as well. Our focus should be on what we can
do to make Sunday feel different than any of the other days of the week. We dont need anyone to give us a specific list of Do's and Dont's. When Joseph Smith was asked how he goverened his people so well, he replied "I teach them correct principles and they govern themselves."
The Sabbath provides us rest from our labors for both our mind and our body. Robert J. Matthews reminds us that "rest does not mean idleness; it signifies rather a change of emphasis. In plain terms, "keeping the Sabbath Day holy" means to cease or to rest from the secular labors of the week and to use the specified day in worshiping God and doing good to our fellow beings. It is a day for spiritual works and refreshment." It is a day we give to the Lord.
(Sabbath Solutions by Trina Boice)