What are the most common signs of pest infestation?

Unwanted pests living in your home or business may not be noticed right away, but will invariably leave evidence of their presence at some point.  Different pests leave different clues, but the most common clues to look for are the following:  droppings from mice and rats, wood shavings and holes in your walls by termites, and cockroach nests in secluded areas such as behind your cabinets, baseboards, and in cracks behind sinks, water heaters, and door frames.