As for figuring it out....
Think of things that take a long time to cook, less expensive cuts of meat that benefit from long slow moist cooking methods, things that get better the next day and stuff like that then take those and try them in the crockpot.
I go through phases where I'll pull it out and use it ever few days and then I might put it up for a month before I pull it out again.
The crockpot cassoulet is great and you can play with the meats and beans.
Layer roasts with different varieties of vegetables.
Pork roast, chops, ribs and/or sausages with choice sauerkraut, onions, apples, fennel, potatoes.
Or slow cooked pork roast Italian style - cooked long and slow with milk, a little white wine, garlic, herbs and lemon peel (optional). Then just reduce the milk down into a 'gravy' when ou get home while you prepare mashed potatoes, pasta or rice.
Cuban ropa viejo is one I do all the time that DD loves - flank or skirt steak with onions, carrots, peppers, celery, bay leaf, cumin, tomatoes and a little water or broth. Drain the liquid off and shred meat and add to the vegetables and enough juice to keep moist. Eat plain with rice and black beans or use to fill sandwiches, tacos, quesadillas, etc.
Beef stews, coq au vin, Molly Steven's Braising is a great place to start as most braising recipes work well.