However, if you decide to call first, be sure to ask the contact when a more convenient time for them to talk would be. It is likely that your contact is at work and busy and you will probably need to set up an alternate time. Always remain professional when speaking with your contact. Your first impression is very important. Ask, instead, for information and have questions prepared.
Name dropping really helps.
It got me my first teaching job. Don't put every piddling thing you have ever done. Just the really juicy things that highlight your best skills and qualities. Have a list at the end of your recent accomplishments, published papers, articles, workshops attended, anything. Prepare questions to ask.