I run BOINC because it helps a wide range of research projects with the potential to positively and massively impact the world. Can you imagine if your computer happened to be the one to find radio signals from extraterrestrials? Or if you helped find the cure for cancer, malaria, or ebola? I think the Clean Energy Project on WCG has already done great things and may help dramatically boost the efficiency of certain solar panels which could have big implications for our environment and energy future going forward. As a scientist, it is comforting to know I'm contributing to science even on days when things aren't going so well in the lab.
As far as suggestions go, we need to spend more time on outreach and funding outreach. We need to tweet and Facebook about BOINC to all our friends and family and write about it in local newspapers and non-tech magazines.