There are heaps of receipes in the Slow Cooker sticky above.
Personally, I prefer not to do mince recipes in the slow cooker but I'm weird. I'm a bit funny about mince. I would do them if I wanted to brown first but I figure if I have it in the pan I might as well finish it in the pan.
One of our favourites is a cheat one. Our curry chicken in the slow cooker is the chicken tonight jar, about 600g chicken, whatever veggies we feel like and almost a jar worth of water or just enough to cover.
Beef ones go well if you throw the beef in seasoned flour before you throw it in. Then add whatever veggies, water and stock.