Good ground is a tying a heavy ground completely from source to end and using ring terminals as often as possible (some places not possible - soldered instead).

Regardless of what Todd says -- the ground still goes through the edge connectors on the CPU's J1 connector and these will cause just as many headaches as the CPU/Driver board interconnect (I know first hand). Can also repin J1 but best to add a heavy connection that does not rely on plugs. Add to the fact that Todd also says to use a *used* wire from a scrap connector - one that has already gone through who knows how many installation/removal cycles.

First video you link to does his 'star' connection at the ground straps at the bottom of the head. Doesn't matter where the star connection is as long as everybody is tied together somewhere.

I run a heavy 16AWG black ground from bridge to cap, from cap to a 'star' connection at the screw in the middle of the CPU board. Star goes off to power supply board (mine has a screw terminal on the board specifically for grounds), to the driver board and also to the sound board. I also run a few red 16AWG wires - heavy power from bridge to cap, from cap to power supply input (mine has a lug terminal on the board) and from power supply to CPU board. This task is made far easier when you use a power supply with screw terminals for +V input, +V output and ground.

Also fix the ground 'mess' of 0.093 connectors at the transformer assembly *if* it used the bunch of ground connections through the 093 plugs (not all did).

Ed

Fork connectors / ring connectors -- they are both good and give you a bit better looking connection. These don't suffer the same problem as other connectors such as push on type connectors because these are screwed down and don't come loose. I have never seen one of these go bad although I can see how the wire can break (but so can a tinned wire).
Fastons or spade type terminals - now that's a different story, those I do not recommend.

The 100 pack fork terminals Ken pointed to are fine. Also, having a good crimper for these makes a world of difference. Watch ebay for WT145C crimpers -- you can sometimes pick one up for about $20.