Most mistakes aren't about picking the wrong company
By the time you're 30 lessons into this course, the concepts behind sourcing, diligence, and terms are familiar. What actually separates new angels who compound into strong long-term investors from those who quietly stop investing after a few bad years usually isn't picking ability, it's a small set of recurring, avoidable process mistakes, most of which this course has already touched on individually.
| Mistake | Why it happens | The fix |
|---|---|---|
| Too few, too-large checks | Overconfidence in a single pick; skipping Lesson 20's portfolio math | More, smaller checks across 15-30 positions |
| No follow-on reserve | Spending the full budget on new logos each year | Hold back 30-40% for winners (Lesson 21) |
| Skipping reference calls | Time pressure, or discomfort asking | Budget the hour; it's the highest-value check for the time (Lesson 13) |
| Chasing hype over fit | FOMO on a "hot" deal seen everywhere | Run the same first-look screen (Lesson 11) regardless of buzz |
| Over-engaging post-investment | Wanting to feel useful and involved | Ask what's wanted; default to introductions (Lesson 22) |
| Ignoring signaling risk | Reading every quiet round as a red flag, or none as a green one | Ask directly why an existing investor passed (Lesson 26) |
The mistake underneath most of the others
A large share of these trace back to the same root cause: treating each individual deal decision in isolation, rather than as one input into a portfolio-level process with its own discipline (sizing, reserves, screening consistency). The lessons in this course that matter most for long-term results aren't the ones about any single clever diligence trick, they're the ones about the process staying consistent across dozens of decisions made over years, especially when a specific deal feels exciting enough to want to break the rules for it.
The mistake that's hardest to see in yourself
Survivorship bias in your own memory: it's easy to remember your winners vividly and your losses vaguely, which quietly erodes the discipline behind sizing and reserves over time as confidence builds on an incomplete picture. Keeping an honest, complete written record of every check, including the losses, is a simple defense against this and feeds directly into Lesson 32's discussion of building a real track record.
Checkpoint
- Most costly angel mistakes are process failures, not bad individual picks: too few checks, no reserve, skipped reference calls.
- Treating each deal in isolation, rather than as part of a consistent portfolio-level process, underlies most of the recurring mistakes.
- Keeping a complete, honest record of every check, wins and losses, defends against survivorship bias in your own memory.
If anything here still feels unclear, ask before moving to Lesson 32.