1st90: The Behavior Brief
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Oliver Buchannon
Mike Heslin

CPO/Co-Founder, 1st90

Behavior Brief #010: The 10-Minute Rule of Culture Change

Mar 11, 2026

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4 min read

Behavior Brief #010: The 10-Minute Rule of Culture Change

Why Small Daily Practices Outperform Every Town Hall

Drew Lincoln
Mike Heslin
Paul Middleton
Drew Lincoln, +2
Behavior Brief #007: One. Five. Thirty

Feb 18, 2026

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4 min read

Behavior Brief #007: One. Five. Thirty

One Behavior. Five Actions. Thirty Days.

Mike Heslin
Paul Middleton
Mike Heslin, +1
Behavior Brief #004: The 30% Rule

Jan 28, 2026

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4 min read

Behavior Brief #004: The 30% Rule

Weekly insights on the behaviors that drive transformation

Mike Heslin
Mike Heslin

002

+2

Behavior Brief #002

Jan 14, 2026

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3 min read

Behavior Brief #002

Weekly insights on the behaviors that drive transformation

Mike Heslin
Mike Heslin