I don't really follow recipes either... just throw stuff together most of the time, but if I do use a recipe it's usually from either Delia or the Jewish Princess collections.
Having said that...
I have a nice marinade for lamb - we often will have lamb steaks. Lamb can be quite tough meat but Susannah says my lamb is the most tender she's ever had. It requires work though lol. I think with meat, you get out what you put in.
Okay so for the marinade:
finely grated rind of one lemon.
the juice of one lemon.
a clove of garlic, crushed.
a tablespoon of olive oil
some fresh mint, chopped (about a tablespoon)
salt and pepper
whisk them all together in a bowl/jug and set aside.
take your pieces of lamb and lay them out on a board.
stab the meat all over with a fork (this should take a while, and make sure to work hard on the areas where there is fat), turn the meat over and do it again.
put the fork down and then use your knuckles to pummel the meat (like you're knocking on a door) all over the meat until it's softened up and kind of floppy.
Tip the marinade into a plastic food bag, a bit at a time, adding a piece of meat in between each addition. Then get all the air out of the bag and tie a knot in the top - make sure all the meat is completely covered in the marinade, and put in the fridge for a couple of hours.
then when you cook it (I roast it) put it in a small roasting dish and cover with tin foil. Depending on the size of the steaks, it can take 20-30mins in the oven at around 180 C (not sure what that is in F). You can just check it every so often, but make sure you cover it properly again with the foil while it's cooking.
Then serve with roast potatoes, veg and minted gravy (or gravy with some mint sauce)