This document provides an overview and summary of a training on tobacco intervention skills for those working with populations that have higher smoking rates, such as those with mental illness or substance abuse issues. It discusses framing tobacco use as an addiction, outlining intervention approaches like the 5 A's (Ask, Advise, Assess, Assist, Arrange), and recommending resources like nicotine replacement therapy and referral to quitlines. Specific high-risk populations are identified, including those with mental illness who purchase nearly half of all cigarettes sold in the US. Barriers to quitting and strategies for motivational interviewing are also summarized.