Easy, cheap and yummy meat stock:
Keep a tub (old ice cream tub works for us) in the freezer, and whenever you have bones, trimmings/whatever you don't eat from a meat dish, put it in the tub. Add the peelings from onions, carrots, sweet peppers, mushrooms, other flavorful veg as you go along. It takes an extra minute every now and then.
Once you have a tub full put it in a saucepan, cover with water, bring to the boil then reduce to a simmer and ignore for a couple of hours. About 5 minutes of time and attention.
When you remember ;) strain through a sieve and leave to settle in the fridge. The fat will rise to the surface and solidify, and can be scraped off. About another 5 minutes of time and attention.
Can be frozen for a month or so, or used straight away.