Small and medium-size software vendors will face challenges in 2009 as the economic climate deteriorates. For many, the best possible leverage for their limited funds will be making effective partnering choices. The right partners can help ISVs reach the most suitable new geographies, industries, and adjacent product spaces with the least investment. ISVs can also use partners' sales and marketing resources for maximum impact if they choose wisely. Forrester offers guidance on how to pick the right partners to drive success and examines how the growing adoption of software-as-a-service (SaaS) offers new types of partnership plays as Web 2.0 marketing takes hold in the IT industry.