Having a number of simple marinades to use on a variety of meats, vegetables, seafood, tofu or haloumi means you have endless flavour combinations to dress up the most plain meal.
The basic rule of a marinade is to combine an oil/fat (olive oil/coconut milk), with herbs/spices/flavour (garlic/oregano/chilli/sauce), with an acid (vinegar/lemon/lime). Make sure you have enough of the marinade to coat whatever you are marinating but before cooking let the excess drip off.
Depending on what you are cooking an hour in the marinade will be enough, if you are cooking a slow cooked roast of lamb overnight is preferable, but seafood only needs 30 minutes as the acid in the marinade will start the cooking process.