Salad is a good stand-by - you can also pep it up with things like sliced mozzarella, feta, halloumi, use pesto as a dressing, bacon bits, chicken....even burgers go well.
The best salads I've had are taco salad. Brown up some mince with some cumin, chilli powder and paprika (or just use a pack of taco seasoning) and then serve it on lettuce with grated cheese and sour cream. Make your own pico de gallo too - dice up some tomato, raw onion and green chilli, add a bit of garlic and lemon juice.
You can also make your own low-carb Caesar dressing with Greek yoghurt, garlic, parmesan, pepper and lemon juice.
My current favourite snacking thing is chorizo crisps. Get yourself a proper chorizo loop, slice it up in to thin-ish slices (not as thin as salami), and then crisp them up in a frying pan - only takes a minute. You can then either eat them there and then, or pop them in a bag for eating later, like chewy, meaty crisps.
Or...why not try Edam wraps. Edam slices (gotta be Edam, it's got the right level of rubberiness) wrapped around sliced ham and thinly sliced peppers.
