Pack your travel beach bag efficiently by prioritizing essentials. Start with a large, sand-resistant towel as a base. Add sunscreen, a wide-brimmed hat, and sunglasses for sun protection. Pack a swimsuit, flip-flops, and a change of clothes. Bring a water bottle, snacks, and a compact cooler. Toss in a waterproof pouch for valuables, like your phone and keys. Don't forget entertainment, such as a book or headphones.