Better phone sex?

My bf and I are in a long distance relationship. We were friends online for 9 years, him in NY and me in SC. He moved to TX for a chance at love that didn't work and we supported each other in our relationships. Towards the end of a bad relationship I realized I had feelings for him and we started seeing each other online. He came to visit in April and that's when we officially began a relatipnship. But now I don't see him til Sept and we are trying our best to take care of physical needs together. Does anyone have suggestions for better phone sex? Or any good strip tease tips for our Skype dates?