I must say I never organise my psds at all. Reason being I don't intend to sell PSDs, consider it annoying and puts off my flow if I am doing it while I work. Also when I code I tend to just code from an image instead of a psd (sometimes necessary).

When I have bought PSDs before I also didn't find it helpful. All the groups just made it more frustrating to find things which right clicking on objects.

I would say if it was for a client that specifically requested I would do it for them but even when I have worked for companies and created psds for them, they haven't minded. It is one reason why I don't both to submit psds to themeforest though.