Preheat oven to 350 degrees F, and line 2 cookie sheets with foil.
Melt the butter in a microwave safe bowl. Add the melted butter and Ranch seasoning packet to a gallon-size Ziploc bag, and seal shut. Mix the mixture between your hands until there are no more dry seasoning clumps.
Add the RITZ crackers, seal the bag and SHAKE! Shake until the crackers are evenly coated.
Divide the crackers between the 2 foil-lined cookie sheets. Spread the crackers in an even layer and bake for 20 minutes. Move cookie sheets to wire racks and cool before snacking!
TO MAKE HAM & SWISS CRACKER STACKERS:
Cut the deli ham and Swiss cheese into rounds. Top the crackers with the ham and cheese. At this point you can either serve them immediately or warm them in a 225 degree F oven until the cheese begins to melt.