Optimal method for a speedy application of cosmetics

Hi all, Given that I only have around 15 minutes to get my makeup done (which is exactly what’s going on with me right now), which elements are the absolute must-haves? My guess is foundation, lipstick, and a dash of quick eyeliner. Any tips? I’m not looking for full-on glamour; I just need something that looks decent without taking forever.:) Cheers!