  We present a set of common themes and recommendations extracted from in depth
interviews with the leaders of 12 distinct cyberinfrastructure software
projects. These interviews were conducted as part of a larger study to identify
and elucidate the best practices and management models that lead to
sustainability for cyberinfrastructure software. Respondents in a formal survey
of cyberinfrastructure users identified these projects as good examples of
sustained software initiatives. While there is clearly no single method or plan
that will guarantee sustainability for all projects, we can draw general
guidance from these exemplars. This paper presents the common themes, ideas,
and recommendations that emerged from those interviews.
