• Business Idea Generator
• Browse Fiverr for services and ideas
• Platforms to sells anything online easily: 1, 2
• Free and easy way to host your website: Wix, Weebly, and uCraft
• Easy marketing with facebook ads, google adwords
• Easy and free tool to create nice graphic designs
• Free stock photo, video
• Google trends to search for trends
• Search for business ideas on google
• Write an one page business plan answering these 5 points:
  1. What will you sell?
  2. Who will buy it?
  3. Do you solve a problem or add pleasure?
  4. How will customers know about your business?
  5. What is your biggest challenge?
• Business Name Generator

Don't neglect marketing (= reaching your customer) and try to sell as fast as possible!

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Suggest more tools/websites/tricks below!