For a mocktail version, replace rum with extra pineapple juice.
You can adjust the sweetness by adding more or less simple syrup.
Fresh pineapple juice tastes best, but canned works too.
Don't over-muddle the mint, or it may taste bitter.
Make a big batch for parties by multiplying the recipe.
Try different fruit juices like mango or passion fruit for variety. These mojitos pair well with grilled foods and spicy dishes.