Building a robust email list is crucial for effective email marketing. Here are some strategies: 1. Website Sign-Up Forms: Include sign-up forms on your website or blog. 2. Lead Magnets: Offer valuable resources like eBooks, webinars, or cheat sheets in exchange for email addresses. 3. Social Media: Promote your email newsletter on your social media channels. 4. Events and Webinars: Collect email addresses during live events or online webinars.