Just read this tip on another thread but it deserves it's very own thread
Google Wayne Goss make up artist, he's my new crush and tells you to moisturise, prime, powder THEN foundation!
Just tried it and it works a treat , didn't even need concealer! Makes perfect sense as it fills pores and I'd a key for the foundation!
You can use mineral foundation too and then liquid foundation.
He also does a video about a tip for eye liner that's worth watching.