My snacks are usually 1cup nonfat no sugar added yogurt (silhouette or astro have my favorite they actually taste good :P) and an apple or any fruit thats around, I dont limit fruits or veggies at all
or I'll have 1/2cup cottage cheese + fruit/veggie
Those are both good options because they have a low GI rating. They wont spike your insulin levels and cause a crash and will keep you fuller longer. they both come out to about 100
calories + whatevers in the fruits/veggies which I dont count. And I find them surprisingly filling, as a person who loves to eat, and eat lots. I felt quite full on them. Sometimes I add a piece of whole grain 3g fibre or more bread with it.
Others I have if I've had a good workout are peanut butter and 1slice of toast. I think comes out to about 180
calories. A little heavier, but I love peanut butter! Use the all natural stuff or make your own.
I usually try for 100-300
calories for snacks depending what I've ate the rest of the day. It all depends on your daily
calories.
There's lots of options. I'm sure everyone else has some great options too!