Cotchin has been mentoring his former pin-up boy and now teammate Brett Deledio.
Deledio is averaging 23 disposals per game in 2013, compared to 27.5 last year.
The 26-year-old former No.1 draft pick and two-time club champion was held to 21 touches in last week's loss to the Sydney Swans.
"We speak in depth about it every week but more so last week," said Cotchin, who admitted to having a Deledio poster on his wall as a teenager.
"The key to beating a tag is winning your own contested footy and he knows that's an area that he's improved in but still can take it to another level," added Cotchin, 23.
"You feel like you're out there on your own sometimes when you're being tagged, especially against the good ones.
"(Fremantle's) Ryan Crowley is one that stands out."
http://www.afl.com.au/news/2013-08-02/dustys-house-in-order