Let pudding set 5 minutes before folding in Cool Whip. Fold Cool Whip gently — don't stir aggressively or it deflates. Break graham crackers as needed to fill gaps; coverage matters more than perfection. Do not rush the overnight rest — 8 hours minimum for fully softened layers. Add fresh fruit topping right before serving, not before refrigerating. Keeps up to 3 days covered in refrigerator. For patriotic version: add strawberries and blueberries in flag design immediately before serving.