PM, especially for initial contact; if the response is positive, then I follow up immediately with a 'phone call; I want to hear a voice. Reasons for starting with PM:
1. In case timing is bad, they can respond at a more convenient time.
2. They know that I'm a member of this site.
3. They have an opportunity to "do their homework" on me before we chat.
Good morning, Sonya. Stay warm today -- or better yet, get hot today!