There are many online resources, such as Food Republic and Men's Health, with instructions for making various kinds of sandwiches. Specific types of sandwich instructions can be found on websites such as the Food Network.
An example of how to make a club sandwich, according to the Food Network, is to toast bread and arrange three slices in a row. Spread mayonnaise over each slice on one side. Place a single layer of lettuce, tomato and turkey on each bread slice. Place each bread slice together and insert toothpicks in each corner. Cut into four sections and garnish with a pickle if desired.