Start with location and vibe (beachfront wellness vs family-friendly). Check facilities (spa, pool, beach access) and room type (villa or suite), plus dining options. Consider your travel companions and whether you want romance/spa focus, family activities, or events, and compare representative options such as Le Vimarn Cottages Koh Samed, Paradee Resort Koh Samed, Thailife Meditation & Wellness Resort, and Rattana Pura Beach Resort.