This infographic from HealthyWomen.org does a great job of summarizing the foods that provide the highest Omega-3 content, which has been shown to reduce risk of heart disease among other anti-inflammatory benefits.
Fish, nuts, seeds, oils and greens top the list for food with high Omega-3. Many major health organizations recommend you eat a variety of fish and shellfish twice a week. If you don’t get enough Omega-3 from your diet, consider taking Fish Oil or Krill Oil supplements.