Effective planning is key to a successful Black Friday email campaign. Start by setting clear goals, such as increasing sales, growing your subscriber list, or improving customer engagement. Next, segment your audience to tailor your messages for different customer groups. Create a timeline that includes a series of emails leading up to Black Friday, including teasers, exclusive previews, and early access offers. Make sure to test your emails for deliverability and optimize for mobile devices, as a large portion of your audience will open emails on their phones.