Resource library · English
Build practical AI skills with expert resources
More than 10,664 professional prompts, step-by-step guides, honest comparisons and curated paths by role. Use them to prepare for structured training, sharpen workflows and choose the right next course.
Free AI ROI calculator
Estimate one month of net benefit. Use the same currency and month for all costs. Count time savings only when capacity is reused or cost is avoided; this is a planning estimate, not a promised return.
Monthly net benefit: $1,900
ROI: 1,900%
Net benefit = hours saved × hourly value − total costs. ROI = net benefit ÷ total costs × 100. Include implementation and review costs for a real pilot. Your inputs stay in this page and are not submitted.
Resource hubs
Five content hubs. We have spent years testing, curating and writing the most useful AI workflows for English-speaking teams.
Prompt Library
Professional prompts in English for marketing, sales, programming, ecommerce, finance and more — many of them open to anyone.
Explore promptsStep-by-step guides
Practical guides for ChatGPT, Claude, Midjourney, Gemini and more — each with real workflows and templates you can copy.
Read the guidesAI tools
AI ROI calculator, prompt generator and a course finder — open utilities you can use in your day-to-day work.
Open the toolsAI articles & comparisons
Honest comparisons (ChatGPT vs Claude, Midjourney vs DALL-E…), industry breakdowns and how-tos — updated weekly.
Browse articlesAI courses by role
Curated learning paths for developers, marketers, founders and operators. See what fits your role and goals.
See course pathsFeatured free prompts
See full library →A sample of the most-used free prompts from our library. Copy, tweak with your variables, and paste into ChatGPT, Claude or Gemini.
Diagnose a campaign that gets clicks but few qualified leads
A funnel diagnosis table and a seven-day test plan. Start with your own evidence and finish with a reviewable next step.
Write a follow-up that advances a stalled deal
Two ready-to-send emails and a follow-up schedule. Start with your own evidence and finish with a reviewable next step.
Rewrite a landing-page hero around one verifiable promise
Three hero drafts and a claim-verification table. Start with your own evidence and finish with a reviewable next step.
Turn one customer question into five useful social posts
Five post drafts with source notes and format recommendations. Start with your own evidence and finish with a reviewable next step.
Create an onboarding email sequence from activation milestones
Three emails and a trigger/suppression table. Start with your own evidence and finish with a reviewable next step.
Consolidate articles that compete for the same search intent
A URL decision map and editorial migration checklist. Start with your own evidence and finish with a reviewable next step.
Identify why customers return a specific product
A return-reason matrix and prioritized corrective actions. Start with your own evidence and finish with a reviewable next step.
Plan a bug fix from a reproducible failure
A diagnosis, scoped patch plan and verification checklist. Start with your own evidence and finish with a reviewable next step.
Why maintain an open resource library?
Because serious AI training works better when the fundamentals are visible. These resources help teams understand the methods, prompts and tool choices behind practical AI work.
When you are ready for a structured path with a certificate, Learn AI in 30 Days gives you the guided curriculum, projects and certificate track.
