Act as a seasoned digital marketing strategist with 10+ years of experience in cost-effective campaigns. Provide a detailed guide on best practices for marketing on a limited budget, tailored for [SMALL BUSINESSES/STARTUPS/NONPROFITS]. Focus on high-impact, low-cost strategies such as organic social media growth, email marketing, and community engagement. Include specific tools or platforms like [CANVA/MAILCHIMP/HOOTSUITE] that maximize ROI. Address common pitfalls like [OVERSHADOWING CONTENT/IGNORING ANALYTICS/POOR TARGETING] and how to avoid them. Structure the response with actionable steps, real-world examples, and measurable KPIs to track success.