Decide what you want to do. Answering the question, 'If you ran the world, what would you do?' identifies what you care enough about to want to do something about. Make it as tangible and achievable as possible. Ideally, localize it. For example, if you'd like to 'help the homeless', why not decide to 'start a food and clothing drive for the homeless shelter in my local community.'

When you answer the question, you have three choices: you can start an actionplatform of your own to make it happen. You'll see the other actionplatforms (in yellow) related to your answer that other people have started, that you could join instead. And you'll see all the microactions (color-coded) related to your answer that you could pick up instantly and do.

If you choose to start your very own actionplatform – what microactions do you need to make it happen? Have a think about what the very smallest steps are that go to make up your actionplatform, and create them. Don't overthink it – you can always go back and re-edit or re-order them. So, for the food and clothing drive for the homeless shelter, microactions might be:

• Ask local retailers to act as donation drop-off points
• Design a flyer to ask for donations from the community?
• Run off 200 photocopies of the flyer
• Put flyers up around neighborhood to tell people where to drop off donations
• Etc etc

Each microaction has a dropdown form so you can describe it – how long it might take, when it has to be done by, what it might cost – and what talents and tools it might need. For example, 'design a flyer' needs someone with graphic design talents. 'Run off 200 photocopies' needs someone with access to tools – in this case a photocopier. When you've filled in the descriptors, you can email microactions to those people in your network who are perfectly placed to do them quickly and easily – your graphic designer friend, or the friend who works in an office where she can photocopy the flyer. You can complete them yourself. Or invite other IfWeRanTheWorld users to help you.

The black bar along the bottom of the screen is your actionprofile. Click on each icon to see your full actionprofile; your superpowers (talents and tools that you enter, and that populate automatically as you complete microactions); actionplatforms you've started or belong to; microactions you've completed; your tribe (people you've helped and who've helped you); where you plus up to do anything else you want to (for example, pick up microactions from someone else's actionplatform, in any area you're interested in); and your actionalerts. You can export your actionprofile to your other profiles (Facebook, Twitter etc) to demonstrate what you believe in and what you're doing about it.

IfWeRanTheWorld works in exactly the same way for individuals, brands and businesses and non-profits. You can all set up actionplatforms and invite each other to help (businesses can often pick up and do many microactions easily in one go; individuals can help businesses and non-profits on the ground in ways and places they can't reach).