I used to eat a lot of almonds, cashews and other nuts for a snack but after a while it messed with my stomach.
Yesterday I did bring an apple.
But I've eaten lunch for today and I'm hopefully good until tonight.
I'm always on the lookout for 'healthy' snacks though.
Typically I try to balance my main three meals each day to account for 3/4 of my calories, and then the remaining 1/4 for snacks. Biggest problem people do when dieting is thinking they can just eat lots of "healthy" foods. Portions are a big deal. Weight loss/maintaining weight and health all comes down to proper nutrition, regular exercise, and balancing your intake:outtake ratio. Things that work well for me:
*Greek yogurt with fresh sliced fruit, high protein Nature Valley Oat & Honey granola, or sliced almonds. Buy the plain greek yogurt as the flavored ones either have lots of sugar or artificial sugars. Good protein source and very filling.
*Hummus and pita chips or sliced bell peppers, baby carrots, broccoli, etc.
*Real dark chocolate. I prefer about 70% and not stuff processed with alkali methods (reduces flavenols which have cardiovascular helping effects).
*Boiled eggs. Pinch of pepper or some hot sauce.
*String cheese made with 2% or just blocked cheddar with pita crackers.
*Sliced turkey or chicken deli meat.
*Smoked fish. Most expensive thing for a snack, but available easily if you're in a coastal area. Otherwise you can smoke it yourself with filets from the store.
*Apples, oranges, bananas, etc
*Regular flavored packets of oatmeal. Combine with some bits of dark chocolate for a supremely filling and tasty snack. Works for lunch too with some fruit on the side.
I combine this with a Fitbit Alta and MyFitnessPal on my phone. Log everything and the fitbit records my activity and when I run. If you can find one, many pharmacies can help you measure your resting metabolism so you can calculate your daily base calorie intake. Create a mental drive to be healthy, commit to it, hold yourself responsible by telling friends and family about your plan, and check your stats every month. It's a slow burn but it works. I lost 40 lbs after college with this (no Fitbit or smart phone then lol), and still continue to battle my work-induced degradation.