Great list of articles that "discuss performance tuning and optimization of Drupal as it pertains to web sites with a large number of visits and page views."
This is actually a bit old now, but since I managed to ignore it for so long, I guess others could benefit from this. Put your views in modules, put your modules in version control, track what changed in views, track who changed it, easily share views on different (dev, qa, prod) servers...
This page is linked from the Devel Module's project page http://drupal.org/project/devel .
I don't know how long the link has been on the project page, but it looks very handy indeed.
I've been starting to make my way through using the Spaces and Context modules put together by developmentseed. It is interesting to start thinking more in terms of re-usable context driven features.