For marinading - get a couple family packs of chicken or steaks, etc. and separate the meat into portions to fit whatever your needs are.

Prepare whatever your favorite marinade is, and combine the marinade and meat in zip-lock or even air seeled food storage bags. put into the freezer and then before work, just take out whatever you'd like, and as it thaws, the meat will be marinating and you'll have a nicely marinated piece of meat by the time you get home.