The Groundwork Index

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33 Startup Foundations How to Bootstrap a Startup: A 7-Part Step-by-Step Guide (2026) 90% of startups worldwide begin bootstrapped. This complete 7-part guide covers everything from calculating your runway to getting your first paying customers without touching outside investment. 12 min read 34 Startup Foundations TAM, SAM, SOM: How to Calculate Your Market Size in 30 Minutes TAM, SAM, and SOM are the three numbers every startup founder needs before launching or pitching investors. This guide explains each one clearly, shows you exactly how to calculate them, and walks through a full worked example. 12 min read 35 Startup Foundations How to Run Customer Interviews That Get Honest Answers Most founders run customer interviews wrong and get polite lies instead of real insight. This guide shows you exactly how to ask the right questions and get the honest answers that tell you whether your idea is worth building. 11 min read 36 Startup Foundations How Much Money Do You Need to Start a Business? The answer depends entirely on your business type. This guide breaks down real startup costs by business model, the hidden costs most founders miss, and how to calculate what you actually need. 11 min read 37 Startup Foundations Problem-First vs Product-First Strategy (2026 Guide) Most founders start with a product. Most businesses fail because of it. This guide breaks down the difference between problem-first and product-first thinking and which approach builds lasting businesses. 11 min read 38 Startup Foundations 10 Questions Every Startup Must Answer Before Building Anything Most startups fail because founders build before they validate. These 10 questions will tell you whether your idea is a real business before you spend a dollar building it. 11 min read 39 Startup Foundations Why Most Businesses Fail Before They Start More than 1 in 5 businesses fail in their first year. This guide breaks down the five real reasons most businesses fail and exactly what to do about each one before you launch. 12 min read