For sweet crepes filled with chilled filling (like whipped cream), simply warm the crepe on medium heat in a non-stick skillet or crepe pan until lightly crisped and hot. Transfer to a plate and add the filling. Roll or fold. For hot or savory fillings, lay the crepe in the skillet or crepe pan and then add the toppings to the crepe. Let the crepe and filling heat through and any cheeses melt, and then fold or roll with a spatula and transfer to a plate.