Depending on what you have available, either place mint and sugar into a sturdy glass or mortar & pestle and muddle the two together. If a mortar & pestle was used add mixture to a glass. Fill with ice (Preferably crushed, I don't have an ice maker in my refrigerator so I used ice cubes). Juice the lime then pour the juice, rum and club soda (An ingredient my father actually doesn't use in his mojitos) into the glass. Stir, test and add more sugar or lime juice if desired. Garnish with mint sprig and enjoy!