For healthy snacks, I bring a piece of fruit, and healthier chips. For instance, I love sweet potato and apple chips, so I'll bring those from time to time. Granola bars are also a staple of mine, but those are not particularly healthy, I guess, just kind of neutral haha. Always a yogurt, too. And, of course, I always have something unhealthy in there like a piece of chocolate or some Oreos lol.
For my actual dinner, it's usually a lean cuisine, sandwich, hummus, or tuna (starkist makes those lunch to go packs, and I buy the sabra hummus with pretzels on top).