Salvage Ideas You may not have thought of. Repurposing Junk
Of course you can use the components in a way consistent with their original use, but :
Use upside down, solder components to the headers, that is the bottom of the header that was soldered to the board is soldered to the component. Then insert the component into a prototyping solderless board. The component makes much better, easier connection than just using the component leads.
Hard Drive Cables
Use any time you need many many connections and would like to be able to unplug the connection. Additionally you sometime find components like LCD displays that will plug into cable. I usually cut the cable and use only one of its plugs, soldering the connections on the other end. You can also reduce the width of the cable and/or plug ( although the plug will be weaker and may need reinforcement.