I've salted my steaks (the salt + pepper + olive oil way that coladin mentions) forever. Always come out delicious, and always better if you can use a bigger rock of salt like sea salt.
Salt/pepper/olive oil is your base for a good chicken rub as well. With chicken, I'll usually add some paprika and cumin to the mix.
With pork, it's a much greasier meat (assuming you bought good cuts of pork, and not the fatless, tasteless cuts that Superstore loves to sell
), so to avoind BBQ wildfires, I usually marinade them in an olive oil/ canola oil/ orange juice marinade - the OJ cuts the oil so it's not a grease fire waiting to happen. Salt, pepper, paprika, cumin, fresh cilantro, lemon juice and OJ... Marinade for the day, get that on the grill, and baby, you got yourself some cuban pork for dinner.