When Charlie was first born, and up until about a month and a half, I had to sit him up and pat his back and walk around. He's always been a good burper (is that a word?) Now at 3.5 months I find that I don't have to get it out of him as much. As soon as I sit him up they come out by themselves. But if he gets a little fussy and isn't burping I lay him on his tummy, that works every time.