Now with the increasing size of memory cards, most of us have become all too accustomed to snapping at anything. After all, we can separate out the keepers from the trash back in the office.
I used to have a policy of not deleting any photo out in the field, but I stopped this a couple of years ago. Now I'm much happier with fewer images and a higher ratio of shots:keepers.
I took the Panasonic DMC FX-150 camera on our honeymoon out in Nevada and California. It was an ideal size, quick to start and produces serviceable images. To manage them, I used Picasa since we only had my wife's old laptop with us and it could just about run Picasa. I was quite happy applying quick edits (e.g. adjusting the white balance, shadows and highlights) knowing that I had the raw files to play with back home (ok, I was wrong). Plus I didn't really want to spend any time doing it, so quick edits were the order of the day.