Y Combinator has funded 4,000+ companies. When Sam Altman ran it, he told applicants the single most common failure mode wasn't bad execution. It was solving a problem nobody had. Most aspiring founders skip the hard part — finding a real problem — and jump to building a solution they think sounds cool.

The blank-page problem

Sitting down to "think of a business idea" is one of the least productive things you can do. Your brain retrieves familiar patterns — an Uber for X, a Shopify for Y. These are recombination ideas, and they cluster in the most competitive spaces because everyone's System 1 pulls from the same cultural inputs.

The solution isn't trying harder. It's using a different process. Structured creativity techniques force your brain off the default retrieval path and into territory where original ideas actually live. Here's how to come up with business ideas using methods that work even when you're starting from zero.

Start with problems, not products

Stripe started because Patrick Collison was frustrated that accepting payments online required weeks of bank paperwork. Calendly started because Tope Awotona was tired of the 8-email chain required to schedule a meeting. Both founders started with irritation, not inspiration.

Write down ten things that annoyed you in the past week. Not abstract grievances — specific moments. "Spent 20 minutes comparing subscription plans that all looked identical." "Couldn't figure out which size to order from three different European brands." Each specific annoyance is a potential business buried inside a real behavior.

Paul Graham calls this "schlep blindness" — founders avoid ideas that involve hard, unglamorous work, even when those ideas are the most valuable. Stripe's paperwork problem was boring. The solution built a $95 billion company.

SCAMPER: steal structures from existing businesses

SCAMPER gives you seven lenses to examine any existing business: Substitute, Combine, Adapt, Modify, Put to other use, Eliminate, Reverse. Apply each one to a business you use every day and you'll generate ideas you wouldn't reach by staring at a blank page.

Substitute: What if a gym replaced equipment with bodyweight-only stations? That's the insight behind outdoor fitness parks in London — F45 applied it to group training. Combine: What if a bookstore was also a co-working space? That model works in cities like Tokyo and Seoul where space is expensive and both businesses share a "focused quiet" atmosphere.

Eliminate: What if a restaurant removed the menu entirely? Omakase does this — the chef decides. Applied to SaaS: what if an email tool removed all settings and just worked? That's the positioning behind Hey.com, Basecamp's email product.

Forced connections: collide two unrelated industries

Pick an industry you know. Pick a random second one. Ask: what would it look like if Industry A operated like Industry B? The forced connection technique produces ideas your brain can't reach through normal association.

"What if healthcare worked like Duolingo?" — daily micro-lessons for managing chronic conditions. Ada Health built a symptom-tracking app on a version of this insight and raised $90 million. "What if real estate listings worked like Tinder?" — swipe on properties instead of scrolling grids. Several startups tried this; Homesearch in the UK gained traction.

The weirder the pairing, the more original the output. "What if funeral services worked like subscription boxes?" sounds absurd, but pre-planned funeral subscription services exist and are growing because they solve a real avoidance problem.

The 'worst version' technique

Design the worst possible version of a business you're exploring. The worst coffee shop: no seating, terrible location, cups that leak. Now flip each element. No seating becomes "takeaway only" — which is the entire model behind Joe & The Juice's counter-service format. Terrible location becomes "mobile cart" — exactly how many specialty coffee brands start.

This technique (called reverse thinking) works because your brain generates bad ideas more freely than good ones. You have less performance anxiety when the goal is failure. Each bad element, reversed, becomes a concrete design choice for a real business.

From exercises to actual businesses

Knowing how to come up with business ideas and actually having a viable one are different steps. The exercises above produce raw material — 20-30 rough concepts. The next step is filtering.

Three filters that work: (1) Can you explain the problem in one sentence to a stranger and have them nod? (2) Would you personally pay for this today? (3) Can you build a crude version in under four weeks? If all three are yes, you have something worth testing. If any are no, you have a practice idea — still valuable as cognitive training, but not yet a business.

Training your idea generation muscle

Coming up with business ideas is a skill that improves with structured repetition. A meta-analysis of 84 studies found that creativity training produces measurable gains (effect size d=0.64) — roughly a 24% improvement over untrained groups.

Sparks applies these techniques — SCAMPER, forced connections, reverse thinking — in daily 5-minute exercises tailored to business and product scenarios. AI scores each response for originality and depth, so you can track whether your ideas are getting more differentiated over time. Five chapters, 95 exercises, progressive difficulty.