Answer:
The COS Project’s plan is twofold:
1) We want to call a convention for a particular subject rather than a particular amendment. Instead of calling a convention for a balanced budget amendment (though we are entirely supportive of such an amendment), we want to call a convention for the purpose of limiting the power and jurisdiction of the federal government. Our approach is similar to the adoption of the Bill of Rights. We seek a package of amendments to rein in the abuses of power by all branches of the federal government.
2) We believe the grassroots is the key to calling a successful convention. The goal is to build a political operation in a minimum of 40 states, getting 100 people to volunteer in at least 75% of the state legislative districts—3000 districts. We believe this is very doable. The most important task is to find our 3000 District Captains. The support of the American people will ensure the success of this project.
A good overview of the plan is available here.