As you're promoting your Thunderclap campaign, it helps to start with people you already know. Friends and contacts tend to rally and promote to their network as well. The best way to approach them is usually through email.
For your closest contacts, it’s best to reach out to them with a one-to-one email. It may take more time to individually write each person or group, but it’s much more personal than an email blast. This is your most valued network, and their trust in you goes a long way in spreading your message, so it’s worth crafting a thoughtful request. You know them best, so personalize your conversation, but be sure to have clear instructions and calls to action that point them to your Thunderclap page.
You'd be surprised how much influence you have in your personal circle.
An email blast to your extended network is a great way to reach a larger audience. There is trust between what you have to say and this network. Be sure that your message falls in line with what the audience expects from this newsletter, otherwise it may appear disingenuous.
Newsletters allow you to promote to a large audience with the same consistent content.