Store leftover meringues (without any topping on them) in an air tight container for 2 days. This is a great recipe you can prepare ahead of time.
In the winter time, if you don't have access to fresh fruit, you can make a simple fruit compote by boiling frozen fruit in a couple tablespoons of water (and a little sugar if needed) to make a fruity sauce. Brighten with a splash of lemon juice after cooking. Use this over the top instead of the fresh fruit.