Yeah, if you may be thinking of making cables, then watch out for some bad jack, connectors... etc. Well, overall, if you don't go to RadioShack but go to any music gear/instruments store... you are pretty safe

(RadioShack, btw, does have bunch of usefull stuff.... but, no good for connectors .... that was tested, take my word on it...heh heh )
I personally happend to buy and used and was very happy with Pro Co cables and parts (or you can search for ProCo ...as one word)
here's parts catalog link:
http://www.procosound.com/downloads/ProCo_bulkparts.pdf
I have madebunch of cables using DynaMike 224s (for stereo, bal, send-return cables) and MusicMover 120s1 for mono/unbal cables, also can be used for instrument and guitars.
I also am pretty sure that I used their ProCo 1/4" mono(s) and stereo(s) plugs...they are great, but I don't remeber what brand RCA plugs I had .... some all-metal handle type. I also have bunch of cheaper plastic RCA plugs... they are okey too for general use, but yeah, they are harder to solder, cos are melting etc and are kinda ...hmmmm cheezy... but it's duable as well, just pain in the neck
/later
/respects