Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a medium bowl, whisk together the flour, baking soda, and salt. Set aside.

In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy, about 2-3 minutes.

Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.

Gradually add the flour mixture to the wet ingredients, mixing until just combined.

Fold in the oats, chocolate chips, nuts, and coconut (if using) until evenly distributed.

Drop rounded tablespoons of dough onto the prepared baking sheets, spacing them about 2 inches apart.

Bake for 10-12 minutes, or until the edges are golden brown. The centers may look slightly underbaked; they will continue to cook on the baking sheet.

Allow the cookies to cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.