What is your approach to system fine tuning with cables and cords ?

Started making my own power cords and speaker cables.
Time to have a crack at interconnect next.
Did make up a new TT 5 pin din to 2 rca cable for my Denon, seemed to work out ok.
Then I only have myself to blame if it sounds like crap...... 

@inna 
Seriously I suggest you have a go at building your own power cords if that is the cabling you wish to start at.
There are lots of threads on this subject and LOTS of information on the web as to how best to approach it.

Now there maybe some really expensive boutique power cords that best my home made items but as I am in for about $80 max on each power cord I cannot say as I am too interested in exploring that avenue.

And truthfully my home made cords were a decent improvement on the mix of Nordost and Wireworld ones I was using so I sold all of those then moved onto speaker cables.