Yep I put an egg and then a bit of bread crumbs. Also cook them well on the first side before turning. Turn the heat down if you need too, but keep it on the first side for a while before turning.

Chicken meatballs

500gm mince
1 egg
1 clove garlic crushed
1 carrot finely grated
1 zucchini finely grated
1/4 cup breadcrumbs
salt & pepper

If you want more flavour... I do this:
1 tsp grated ginger
1 tbsp soy
1 tbsp sweet chilli

This makes them thai meatballs yum