I've been shooting RAW+JPG for a while (as in few months) and I have noticed that there are times when trying to shoot in rapid succession the camera lags - I will need to try and remember to turn to just RAW when I think I'll shoot some action shots where I'd like a batch of images shot in rapid succession.
The other issue I'm facing is my Photoshop Elements catalog is double what it needs to be. I have at least two of every shot - I say two because when I touch up an image that is saved in a bunch with the original. I also tend to shot several shots of the same thing, so in the end of the day I end up with a whole bunch of sameness in my catalog. I've used PSE's stacking feature to reduce screen clutter when I'm looking back for an image.
I really need to start using the PSE's cataloging features to tag and rate my images so that I have a better chance of finding them. Spend too much time scrolling through images looking for a particular picture.