It's good you are getting excited about next
year. I too am already planning for next year, and at the same time, I am getting ready to get a job at a different school.
First go over in your mind what you know that worked. This will make general planning for next year much easier.
I have a game day. I am always looking for games to play with my children to reinforce skills. I used to play around the world, but I have a very small class of very diverse children, so instead I play "Erase a Face." I draw a goofy face on the board and then each child is responsible for the answer, whether is is math or reading I can make the question harder or easier for the stuggling children. If there is a miss, a part of the face is erased. The children always are calling out the part they want erased. If there is any part of the face left when the game is done, the children win and I usually give them a piece of candy. If the face wins, no treat.
I am old fashioned and we do seat work in the morning. I try to vary this so it is fun for the kids and I try to make some easy and some harder. I use individual chalk boards to work with words. I write a word on the board, have the students copy it then change maybe the first letter and have the children read the word. I didn't have my chalk boards at this school, and I really missed them.
As for the music, I'm at a loss for any suggestions. I do listen to soft music while the children are working. It is sootheing and drowns out some of the other noises we hear that we can't do anything about. We have a music teacher here, and we have a volunteer to teach some songs of the culture.
Over the summer you might want to look at as many teacher sites as you can find to get some more ideas of things to do. There are many things posted here with some great sites listed to visit.
Have fun the rest of the year, and good luck with your second year of teaching.