List Building Pro Tips

Core Principles

1. Mix Sources

• Don't rely on just one data provider
• Each source has different strengths/coverage
• Combine for maximum coverage

2. Scraping = Step 1

• Raw scraped data is just the beginning
• Still need Clay enrichment for:
  • Email verification
  • Phone numbers
  • Company data
  • Custom signals

3. Templates Are Modular

• Start with proven templates
• Adjust for specific campaign goals
• Don't rebuild from scratch

4. Don't Reinvent the Wheel

• Use existing Clay templates
• Modify rather than create
• Learn from what works

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Data Quality Hierarchy

1. Verified email (bounced < 2%)
2. Direct phone number
3. Recent activity signal
4. ICP fit confirmed
5. Company enrichment complete

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Efficiency Benchmarks

Task	Manual Time	With Clay
100 prospects	8-10 hours	30 min
500 prospects	40+ hours	1-2 hours
1000 prospects	80+ hours	2-3 hours

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Quality Checklist

Before launching any campaign:

• Email bounce rate < 2%
• At least 70% email coverage
• ICP criteria verified
• Recent signals tagged
• Duplicates removed
• Competitor customers flagged
• Do-not-contact list checked

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Common Mistakes

1. Single source reliance - Limits coverage
2. Skipping verification - Kills deliverability
3. Over-filtering - Shrinks TAM too much
4. Under-filtering - Wastes outreach on bad fits
5. Ignoring signals - Missing hot prospects

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Combines with

Skill	Why
lead-sources-guide	Choose right sources
clay-enrichment-9step	Full enrichment workflow
email-metrics-benchmarks	Track deliverability
clay-buying-signals-5	Add signals to lists

Example prompts

Review my list building workflow against the quality checklist.

What's the fastest way to build a 500-prospect list for fintech CFOs?

How do I diagnose why my email bounce rate is above 2%?