I know what it's like. "Eat healthy" they say.. But there's only so many hours in a day to prepare and consume food.
Personally I like to keep some Boost in the fridge for days where I'm late and have no time. It's essentially a multi-vitamin and an appetite suppressant all in one easy to drink on the go solution.
I also stock specific vitamins for colds and other illnesses but they are too expensive to depend on day-to-day. This is the best site I've found for discount vitamins. After shipping and such you'll only save a bit, so the best savings is really a proper diet. 🙂