I try to mix it up with snacks too, but find i normally stick with fruits and nuts mostly. I eat every 2 or 3 hours though, so i kinda consider everythign a shack. Here are my main pairings though.

-5 triscuit crackers (or graham crackers)
-laughing cow cheese wedge (the strawberries and cream one is good with the graham crackers)
-kiwi or half a banana

-peice of fruit and handful of pistachios or almonds

-low fat string cheese, 17 peices of turkey pepperoni and some strawberries

-horse cookies (the recipe is here on mfp. i actually really like them and added nuts to my recipe so it's a complete balanced snack to me)

-yogurt and some pretzels or carrot sticks

even though i can't really deal with it cottage cheese seems to be a popular snack

-rice cakes with peanut butter and some celery

-hard boiled egg and a handful of blueberries

I love greek yogurt with a piece of fruit. I use my apple wedges to dip in it. I also love rice cakes and natural peanut butter. I really want to try carrots and hummus but have not done it yet

Avocados are my favorite snack food, they are high in calories and fat but they fill you up and are loaded with vitamins and animo acids which can give you a boost in energy. I can eat them raw although most people cant- you can add one to cottage cheese or some crackers and its just as delicious!

I struggle with snacks too, as the natural thing for me when I wanted a snack was to head for the biscuit tin or the chocolate bars! I don't like fruit or nuts, though have fruit as part of my 5-a-day.

I have recently been having Rivercote wheat crispbreads (Lidl) - 4 of them are about the same number of cals as a slice of bread. I have some light Philadelphia on one,and it really fills me up. Cadbury Philadelphia is good, and two crispbreads fills better than a biscuit. Raw red or white cabbage is a great substitute for crisps and has a lovely spicy taste.

I love V8, the carrot and tomato juice drink, and add some vodka and lots of ice and it really satisfies!

Will be really interested to see some other suggestions!

Went Tesco shopping yesterday, and they have the cadbury choc Philadelphia on sale - only 81p - I have been having it spread thinly on a crispbread, (Rivercote from Lidls are nice) and it makes a far more filling snack than a choc. digestive biscuit, for only about the same number of cals. They also had 4 tiny tubs of it, not sure if you have to eat like a pudding... will investigate!