If you are still not sure about which song to choose, you can use the Wishlists to organize all the tracks you like. To add one to your Wishlist, go to the details of the song and click on the little heart that appears on the top right of the image. You can create different lists and organize the tracks as you like.
To view them just go to your profile and select Wishlists on the dashboard on the left. You can create thematic lists and organize them as you want!