I swept the entire garage one day then pulled out a magnet to go over the pile of debris. Finally found the spring for the magazine catch on my old P220. Also did the hands and knees move in my livingroom looking for a spring for my Glock. It was then when I learned the value of a 2 gallon ziplock bag. Really keeps those boing, bing, ting, tick, tick, tick pieces from launching into orbit.
Hanging a towel and aiming whatever springloaded part you're dealing with at it works pretty well too.