1: 1. Start with high-quality tuna. 2. Add crunch with celery and nuts. 3. Mix in a dollop of Greek yogurt. 4. Spread on whole grain bread.

2: 1. Enhance flavor with fresh herbs. 2. Include some diced red onion. 3. Don't forget a squeeze of lemon. 4. Top with avocado for extra creaminess.

3: 1. Opt for low-fat mayo or hummus. 2. Season with salt and pepper. 3. Customize with your favorite veggies. 4. Use whole wheat pita for a twist.

4: 1. Pack in a bento box for on-the-go. 2. Pair with a side of fruit. 3. Swap mayo for mashed avocado. 4. Upgrade to whole grain wraps.

5: 1. Elevate with a sprinkle of feta. 2. Sub in canned salmon for variety. 3. Experiment with different spices. 4. Add a drizzle of balsamic glaze.

6: 1. Create a lettuce wrap option. 2. Balance flavors with pickles. 3. Mix in some dried cranberries. 4. Serve with a side of homemade soup.

7: 1. Kick it up with a touch of sriracha. 2. Garnish with chopped cilantro. 3. Amp up protein with chickpeas. 4. Stack high for a hearty meal.

8: 1. Include a slice of smoked gouda. 2. Consider using tuna pouches. 3. Incorporate chopped apples for sweetness. 4. Pair with a cup of green tea.

9: 1. Try a tuna melt variation. 2. Toast the bread for added crunch. 3. Use a lettuce cup for a low-carb option. 4. Get creative with your favorite ingredients.