We share this stuff on our blog almost every day. Keep an eye on Signal vs. Noise (http://www.37signals.com/svn http://www.37signals.com/svn) and the Product Bl

We share this stuff on our blog almost every day. Keep an eye on Signal vs. Noise (http://www.37signals.com/svn http://www.37signals.com/svn) and the Product Blog (http://productblog.37signals.com http://productblog.37signals.com) and you'll see all sorts of posts about building products, performance, improving, new features, tips and tricks, case studies, etc.