Popular Mechanics has twenty ways. They left out the most important one, though:

It is instructive, and educational (particularly for those who haven’t seen it since high-school civics class, if then) to read aloud Jefferson’s work of genius, the Declaration of Independence. In so doing, we are reminded of the principles on which this country was founded, the offenses committed against our ancestors by the English king, and the reasons that we forged our own nation.

So, I hope that you thank the founders who solemnly pledged “their Lives, their Fortunes, and their sacred Honor“–who sacrificed so much, and actually underwent bombardment by true explosives, so that you could enjoy your barbecued ribs and potato salad, and the benign burning of colorful chemicals launched on rockets.