Maybe even give her 'homework' and have her write essays to you alongside various topics: ie: what is her greatest fantasy involving you.

Have you 2 ever played in real life? Or is this something that is set for in the near future? Maybe the week before you both are to get together for some fun, get her to cut a small bit of fine sand paper and put it in her bra so it will wear away at her nipples and make it sensitive. Do not let her play with herself at all during this time so when you both catch up, she will be hot and ready and sensitive for you.

Maybe get her to put some toothpaste on her clit while she is on the phone talking to you. Maybe even stick some ice cubes up inside as well? or to make an ice dildo (put water in a condom and freeze it) and then she has to orgasm on the ice dildo? (depends if you want to be a lil evil I supose)

there's a few ideas.