Preparing salads ahead of time makes on-the-go meal time a snap. Just be sure to keep them cool with plenty of ice or cold packs. For green salads, pack the ingredients separately, then assemble and dress the salads just before serving to avoid limp and soggy greens. Or, use a large mason jar and layer ingredients: dressing, protein, then veggies. The layers will keep greens fresh and crisp until ready to serve.