It nearly destroyed me first. Quick context: 25, Portugal, left everything to build in AI/automation. The last 2 years? Brutal. Built and failed 3x. Burned through savings. Almost lost my sanity. But I learned more failing than any MBA would teach: TECHNICAL WINS ✅ - n8n: Can automate almost anything - Obsidian: Built a second brain that actually works - AI: Prompts that generate consistent results REALITY CHECKS ❌ - Having technical skills ≠ having a business - Ideas without disciplined execution = expensive hobby - Solo founder without network = recipe for burnout I'm starting over. 4th time. Different approach. THE QUESTION: For those who've built something sustainable - what do you REALLY wish you'd known when starting? Not tools or tactics. The mental game, discipline, and how to survive the valley of death without losing it. Cheers, Sayd PS: If anyone needs help with n8n or Obsidian, happy to help. Least I can do for this community.