Ok here's a little trick that works for me. Think of your pp'ing like a party. A piece of paper and a piece of fabric come to the party.
Fabric likes fabric and paper likes paper. The first piece of fabric gives the paper the "cold shoulder" so the "right side" of the fabric faces out and so does the printed side of the paper so they dont have to "talk". You have to pin or glue them together because they dont like each other.
Then the second piece of fabric arrives at the party she wants to talk to the first piece of paper and gossip behind the paper's back so they are face to face or right sides together on the backside of the paper. Sew, flip, trim.
Then another piece of fabric comes to the party, he wants to chat up the second piece of fabric so they are face to face talking. Sew flip trim and repeat.
Just keep adding to the fabric party while the paper is left all by himself.
The hardest problem that I have with pp'ing is making sure the pieces are big enough when they are oriented on an angle.