When meeting people you don't want them to see your eye make-up, you want them to notice your eyes. Most offices have fluorescent lighting, which is highly unflattering. To counteract these conditions you should keep your make-up and especially your foundation light and natural. If you're going out straight after work you can just intensify your daytime look. Make sure you bring along a good palette of neutral colors, so you can do a quick touch-up.
Good quality make-up tools are essential for the perfect look.
This is not an area to skimp on. The right tools will give you the professional polished touch, as brushes of high quality are designed for specific areas on your face. You will get a natural and longer lasting look, and have better control of your make-up technique. If you have a limited budget, start with just three or four basic brushes. For a light sheer look, dampen sponge before applying foundation.