Here at Firsthand, one of the things we have heard is that students have a difficult time overcoming a mental barrier. That mental barrier is different for each advisee, but a lot of times, that barrier can be surpassed with knowledge and preparation. Looking at some data, once an advisee has their first meeting with an advisor, they are between 60 and 70% likely to schedule a secondary meeting. Below you will find an 8 email campaign, but feel free to edit, change things as much or as little as you would like to fit with your institution.
Also, there is a one page flyer here that you can use as well.