Mix a little primer with your foundation

Yesterday I was Stumbling and found this makeup trick: to mix a little primer with your foundation. It helps the foundation to blend it and have nice finish that's not too cakey. I tried it this morning. It helped my makeup to turn out really nice. I had purchased some foundation a couple of months ago and was not too happy with it. It went on too thick and I had to play with it to figure out how to make it look decent. Anyhow mixing a little primer with it right before I put it on seemed to do the trick.