Trescothick was speaking following the Professional Cricketers' Association's launch of a series of six online 'Mind Matters' tutorials. They cover subjects including alcohol and drug abuse, gambling, plus anxiety and suicide, and offering advice to members on how and where to seek help.
The tutorials are mainly presented by Trescothick, who has suffered from depression and anxiety throughout his career.
"There is lots more understanding and more procedures to help people and I would have loved some of them to be in place during my experiences," he said.
Michael Yardy, who flew home from England's 2011 World Cup campaign due to depression, and Warwickshire wicketkeeper Tim Ambrose, another player to suffer depression, also present a section on the topic.
Former England all-rounder Andrew Flintoff and ex-Essex and Northamptonshire bowler Darren Cousins, who attempted suicide in March 2011 following his retirement, have also made contributions to the initiative.
When Somerset batsman Trescothick returned home from England's tour of India early in 2006, and from the Ashes tour of Australia later the same year it brought the taboo issue of depression within sport firmly into the spotlight.
And Trescothick, whose 2008 autobiography 'Coming Back to Me' won the William Hill Sports Book of the Year award for its account of his illness, admits he wishes measures like the one unveiled on Monday had been available to him.
He added: "As I said, we are leading the way, be that in dealing with drugs, gambling, depression or anxiety, there is a massive difference from just a few years ago.
"It has helped the process of breaking apart the taboo that sports people have to be mentally infallible. We can do more to make things better again but it is 100% better than it was a few years ago. It is less and less of a taboo."