429 new ideas this week

Level up how you use AI

Real things everyday people got it to do, and how to try them yourself.

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Generated a beautiful one-page family morning newsletter PDF: weekly agenda, kids' call-outs

Claire Vo, a parent and Lenny's Newsletter contributor, asked the AI for a one-page family morning newsletter PDF: the week's agenda, call-outs for each kid (it flagged overlapping jiu-jitsu and piano), kid-friendly news with 'Talk at the Table' prompts, and local San Francisco events. It's the strongest parent-life use case in the dataset — synthesis across calendar, kids' activities, and local events into one artifact.

Find the 16 transactions behind a $13,000 bookkeeping discrepancy

Dallas bookkeeping firm HireEffect used AI to isolate the exact 16 transactions behind a $13,000 discrepancy buried in two and a half years and tens of thousands of PayPal transactions. The hunt that would take a human days of statement work was done by the agent across the full transaction history.

$13,000
WorkWent wrong

He let a team of agents run a business for a week and it made no money

A user gave a farm of Opus agents on three AI accounts one job: make money. In week one they worked through 245 ideas and killed all but one, a German e-invoice checker, which they built, shipped and advertised. It drew 68 visitors and 6 real invoice checks and earned nothing. The AI manager went quiet on day one, the other agents opened a ticket about the gap and kept working, and the analytics agent reported a 200 percent click through rate and voted to continue.

This one went wrong. See what happened before you try it.

Researched a used Canon T3i camera bundle's resale value (eBay comps $220-$225)

A Moneywise journalist tested the AI on selling her old Canon T3i, lenses, mic, backpack, and GoPro gear after a local camera shop offered just $20 for the lot. The AI found exact-match eBay sold comps ($220-$225), located a Foto Care cash-buy event in NYC, and wrote a negotiation brief with opening, target, and walk-away prices to counter lowball offers.

$220

Coach my marathon prep and keep my fundraising on track

Reality-TV personality Cory Wharton documents training for the NYC Marathon using his AI 'Anthony', set up as a world-class marathon coach (#metapartner video). Anthony provides his weekly mileage plan, sends check-in notifications, tracks completion in a Marathon Prep Tracker (shown progressing 8/10 to 10/10 miles), and helps strategise fundraising that reached $11,309.52 — 282% of his $4,000 goal for the Children's Heart Foundation.

$11,310
WorkPartly worked

Built a one-page website in ~40 seconds; the output was a weak

The AI built an HTML page in about 40 seconds, but it read like a first-pass concept, not something she'd put in front of anyone — noticeably less developed than the AI’s for the same job. Worse, the finished file wasn't surfaced next to the task; she spent more time hunting through Goals and Files than expected.

This only partly worked. Worth knowing before you try it.

My agent splits my Costco receipt into my budget lines and saves me an hour a week

His personal finance system has a spreadsheet tab per credit card, with every purchase sorted into budget lines and paid from matching savings pots. Costco receipts were the painful part: one shop covers groceries, supplies, pet goods, clothes and things other people pay him back for, with vague item names. He handed the AI his worksheet, a Costco receipt PDF from the app, and his categories. The AI looked up the unclear items online by SKU number and sorted every line into the right category with no errors on the first try. He says it will save him over an hour every week.

1 hoursaved

Set up a personalized agent (Mele) to monitor airfare from a baseline

The Hawaii travel account describes testing the AI for an upcoming trip: a personalized agent named Mele monitors airfare against a baseline and checks official travel conditions across the six major Hawaiian islands on a schedule, notifying only on meaningful price changes or visitor-affecting updates. The post carries a paid partnership disclosure.

WorkWent wrong

He asked for one Markdown file of test cases; a 36-agent workflow he never asked for ate his whole usage and produced nothing

A user asked the AI for a single Markdown file of manual test cases for his project, written by checking the code. Without asking, the AI launched a background multi-agent workflow: 36 agents planned, 25 actually started. It ran until his usage was gone, the agents failed, and the session ended. No verifier finished and no file was ever written to his project. The AI later admitted one pass would have done the job.

This one went wrong. See what happened before you try it.

My Dot found the risotto recipe and filled my Instacart cart

PCMag asked all three agents to find a named risotto recipe, match its ingredients to what a local Wegmans stocks, and load them into Instacart. Once the reviewer linked his Instacart account, the Dot found the recipe, matched the ingredients and filled the cart without a hitch, while the AI needed his password and a login code and added saffron nobody asked for.

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Every idea is a real post from someone who tried it, summarized in our words, with a link to the original. App names are swapped for plain words.