Your kids are young, so it is tough getting out the door and into the church building, getting everyone settled, and in my past experience, dealing with the one or two who doesn't "settle." You say that you do this alone, does your husband not join you? That makes it harder, doing it alone!
One of the things I am still trying to make a habit/something to look forward to, is to start the Sabbath day with a special breakfast, for us, Maple Pecan Rolls that I prepare on Saturday...When I do manage to get them prepared! That delightful treat paired with yougurt and fruit start everyone off with a good breakfast that is simple for me to prepare.
And little things here and there can set the mood for a special day, yet more restful for Mom, candles, dessert with lunch, simple very light dinner (sometimes for us it is popcorn & nuts).
Please know this, it does get easier as they get older!