Hi, I see quite a few posts on the forums here that talk about connection and cable hassles, and the frustration of flakey connections that are hard to pin down to hardware or software.
I personally hate flakey rats-nest setups when I'm trying to debug something, and that's been a main motivation for finding solutions that work well with Arduino.
I have put together a WIKI section dealing with all this here: http://arduino-info.wikispaces.com/Cables
Hopefully this will help guide newcomers in ways to minimize Connection Frustration.
DISCLAIMER: This also points to examples of stuff on my site, but these products are widely available from other sources.
Comments/Suggestions for other related things you'd like to see covered are appreciated!