Jamie Oliver has a great section in his books on rubs and marinade..here is a couple we have tried and tested

rosemary, garlic and lemon marinade

2 good handfuls of fresh rosemary, pounded
6 cloves of garlic, crushed
10 lugs of olive oil
3 lemons, halved, juiced and skin squased
freshly ground pepper

Mix everything together and massage on to your chosen meat. Leave the meat in the marinade till you are ready to cook it.

hot and fragrant rub

2 tablespoons fennel seeds
2 tablespoons cumin seeds
2 tablespoons coriander seeds
1/2 tablespoon fenugreek seeds
1/2 tablespoon black peppercorns
1 clove
1/2 a cinnamon stick
2 cardamond pods
salt and freshly ground pepper

Lightly toast all the ingredients in a pan over a gentle heat before pounding or crushing into a fine powder. This can then be rubbed generously over your chosen meat.