Thank god for the LR database. I just had to find a single photo out of several thousands. All I needed to do was to search my keywords for specific keywords and voila I had it within seconds. Of course every photo is keyworded with Place, Location, Person, Time, Lighting, Landscape, Seasons, Weather, Technique, etc.
Once you get in the habit of keywording all images after every shoot it makes perfect sense and doesn't take much time at all. What takes time is the inital keyword setup and the exercise to get them all done (I hired someone to et my database updated).