Some of the toppings and combinations that work well are:
1.Chopped pecans and walnuts
3.Toffee Bits and Coconut
4.Mini Marshmallows and Chopped Pecans
5.Peanut Butter Chips
6.Chopped Maraschino Cherries
1/2 teaspoon of vegetable shortening added to the chocolate chips when melting them, can help give a smooth consistency to the chocolate that makes it easier to work with.