First of all , you need to know their need and use SFI as a solution to satisfy those needs.
I think an unemployed or under-employed person need a good job to make money.
So the best tools is your own approach or your own strategy even if SFI has many tools.
Show them that SFI is the way for for them to make money in the comfort of their house.
As they are their own boss and they will manage their time to make money month after month.
Then show them how : to do so, direct them to "SFI BASIC" page. There they will discover how they can use 4 ways to make money.
If their need is to make money, they will ask you to help them to start this business.
You will tell them that the best way to understand SFI is to register free and start learning the Launchpad where they will understand how to manage their business and succeed.