What is one way that smaller interest groups can most effectively boost their political power?

Lobbying

Explanation:

Lobbying have to do with an interest group trying to influence legislatures stand or opinion on issues that will affect them.

Small interest groups can effectively utilize the tools of lobbying to pass legislatures that will favour them and give them political powers. They will most likely not be able to sway votes or public opinions since they are a minority thus lobbying is an option that can be fully utilized.