This issue of WIN (Welfare Information Network) Issue Notes raises some major issues that agencies may want to address as they consider expanding collaborative efforts. It describes collaborative efforts and identifies resources that could prove useful in designing successful collaborations. Section 1 offers background. Section 2 answers these policy questions: why collaboration is beneficial; how agencies identify partners; what the mechanisms for assigning responsibility are; how participating agencies define objectives; what critical components of successful collaboration are; what funding strategies are; and what the mechanisms for sharing information across agencies are. Section 3 summarizes research that suggests these actions that can lead to successful collaborative efforts and interagency projects: developing a clear explanation of why certain issues are best addressed by multiple groups; ensuring support from the highest levels of the organization; streamlining service delivery and providing a single point of contact; and encouraging regular communication among partners. Section 4 describes successful innovative practices and contact information: EMPOWER Kentucky; GENESIS; Linkage Team; Local Investment Commission (LINC); Neighborhood Networks; New Hampshire Employment and Training Program; Rural Partners; and Smart Start. Nine resource contacts and 19 publications are listed. (YLB)