If you like spicy, leave the seeds from the jalapeño pepper in. It will already be slightly spicy without the seeds, but leaving them will take it up a notch or two.
Not a fan of cilantro? Leave it out or replace with basil, mint, chives, or scallions.
Using a not-quite-ripe mango: If your mango isn't quite ripe, or if you just have a bit of a sweet tooth, you can add 1-2 tablespoons of honey to the mix. I recommend whisking it in the bottom of a large bowl with the lime juice and salt until it's dissolved, then tossing the remaining ingredients with it, so it coats everything evenly.
The provided nutrition information does not include any added sodium from seasoning to taste, any optional ingredients, and it does not take brands into account. Feel free to calculate it yourself using this calculator or by adding the recipe to Yummly.