Ooh, good question!
Barry M Dazzle Dust eyeshadow (can also be used as highlighter if the colour is appropriate)
Bourjois blusher (a classic)
Maybelline Superstay lip colour (my current must-have)
Collection 2000 powder foundation (it's a 3-in-1 wet or dry product that you can use as powder, foundation or concealer)
Maybelline Volume Express mascara (inexpensive but does the job reliably!)