Re: Oly RAW to JPEG to PS
I think you are on the right track. I save all of my original RAW files on computer external HD, DVD, and Flash drive. I then also save the edited Jpeg the same way. I also have a web site that holds my full sized finished image. Just in case something really bad happens I have the final edits stored online. Keep everything backed up and organized. I save a file for every months shootings, but I shoot a lot.
Getting a good work flow is very important.
Re: Oly RAW to JPEG to PS
Since I mostly Use lightroom I just keep everything in raw format (Changes are made via an external file) which is read in my those programs leaving the origional RAW file in tact. Only need to use TIFF or PSD's for layering etc.