The pulled pork is amazing, shall be having it tomorrow! Size wise, whatever you want to buy! I've got a joint that says serves 3-4 people or tomorrow, there's DH and I and DC1 (who's only 4) and just weaning DC2 (who'll just play with a bit, then I'll find bits of pork all over the high chair for the next week), there's going to be enough for dinner and then normally that size joint will leave enough for us all to have pulled pork sarnies one day next week.
I'm a big fan of making double for left overs too.
Forgot to mention, make sure you put a lid on the pan in the oven - keep the juices in!
Another suggestion, lamb stew:
fry off chopped lamb with quartered onion and large chunks of carrots. Add a glass of red wine, a pint of stock, a generous slug of worcestershire sauce, tablespoon of cornflour, half a teaspoon of cumin and same of smoked paprika (more if you aren't serving for little ones), half a tablespoon of tomato puree and a squeege of garlic puree. Reduce down a little bit on the hob then stick the lot in the oven on a low heat for the bulk of the day. (can you see the theme with my cooking?!? I usually get a lull in DCs needing my attention straight after breakfast or after lunch when DC2 has a nap, this is when I get stuff in the oven - we eat a lot of stew and slow cooked food). Serve with a good dollop of mash.