Opti's blog covers mutual funds, personal finance and saving, offering both fund-school style guidance and critical breakdowns of individual funds. Recent issues combine behavioural economics, such as why people chase limited-edition trends, with book recommendations and practical saving tips.

A Substack on decision making under uncertainty from author Annie Duke, featuring her own essays and guest posts on behavioral science and practical choices. Readers get frameworks for better judgment, plus promotion of related books, classes and events.

Profit Patterns is a German-language newsletter that translates behavioral research into practical levers for increasing sales, such as product placement and visual cues. Each issue presents a psychological effect, the research behind it, and concrete steps for marketers and business owners to apply.

A Polish newsletter explaining mental models and cognitive biases, such as one-way versus two-way door decisions, anchoring and the availability heuristic, with examples from business and psychology. Each issue offers a concise, practical lesson for making better decisions.