I would suggest keeping both CS5 and CS6 versions on the system until you are fully transitioned, longer if you want. When you launch Photoshop CS6 it will ask you if you want to import settings from the prior version. Third party plug-ins may or may not be compatible between versions so you might need to check with the manufacturer to find out. You would most likely need to reinstall any third party plug-ins that integrate into existing Adobe product installations though.
I found this document for Photoshop CS6
For the PS actions, I normally open the actions panel, highlight the actions set (folder) I wanted to migrate, from the flyout menu of the panel choose the option to save the set, this creates the .atm file. There is another option for importing actions in the same menu.
I can't speak to migrating in relation to the other products. I would recommend posting in the respective product forums.
Your tip for the PS Actions did the trick. I will keep the CS5 versions for as long as I need them.
I can't seem to be able to open that link though.
Glad that helped. I posted the wrong link but I fixed it now.
Still doesn't work for me.
Plus this FAQ
FAQ: How do I migrate my saved presets from an earlier version of Photoshop or import/export them?
That is the correct one, thanks John.
Thank you John, that is very helpful!