Easterby was hugely disappointed with the Scarlets defeat
Simon Easterby admits the Scarlets must wise up to avoid falling to another "embarrassing" defeat.
The west Wales region kicked off their RaboDirect Pro12 season with a 42-19 defeat to reigning champions Leinster.
Easterby's men appeared on course for an impressive victory at Parc y Scarlets after leading by six-points at the interval.
But Leinster ran riot in the second-half with three tries coming in the space of just 13 minutes.
"We felt we produced some really good rugby in the first half and were in control, but we conceded an early try in that second half, lost our composure and never got control back.
"Our scrum was good, we had good possession and field position and the scoreboard was ticking over.
"We did everything we talked about ahead of the game but after half-time we had a bit of meltdown. We started chasing things, the more we chased things the more we tried to force things and the ball was more often than not lost.
"We can't fault what we were doing up until half time. But some individual error, composure lost and maybe our leadership was lacking.
"We have to improve our game management, we have to make sure we don't embarrass ourselves again.
"Mistakes are frustrating and if you make that many it is very difficult to win a game of rugby. When you have a team that capitalise on mistakes like Leinster, you are going to put yourself under pressure."
The Scarlets woes were compounded by an injury to Joe Snyman. The South African second-row left the field with his arm in a makeshift sling and he will be assessed today.
"We're not sure on the extent of Joe's injury yet. We picked up a couple of bumps but hopefully nothing too serious."
The Welsh Rugby Union has awarded a unique 'President's Cap' to a specific group of players who represented their country between 1945 and 1979, but missed out on international recognition at the time.
Prabhat Mathema, the WRU's National Medical Manager explains the four part Pitchside Suspected Concussion Assessment process the IRB has devised that is being implemented throughout the Dove Men Series and in the LV= Cup this season, which includes the provision for a five minute temporary substitution to allow an assessment to take place.
This week we celebrate the contribution of the Millennium Stadium to Wales in the Principality Welsh Rugby Union Podcast. We speak to WRU group chief executive Roger Lewis and stadium manager Mark Williams. Warren Gatland, Sam Warburton, George North, Mike Phillips and Ryan Bevington reflect. Scarlets coach Simon Easterby and Blues captain Sam Hobbs look ahead to the Heineken Cup, while former Wales Sevens player James Harris is getting ready for his second Oxford Blue when they take on Cambridge in this year's Varsity Match.
Defending champions Ospreys struggled to secure victory against the Scarlets while the Blues overcame the Dragons in the opening round of the WRU Women's Regional Championship held at Llandarcy on Sunday.
Welsh rugby fans can get their tickets now for this season's RaboDirect PRO12 double-header derby event at the Millennium Stadium on Sunday 20 April 2014, with early bird discounts on purchases this Christmas.
The latest news, results and tables from the Blues region
The latest news, results and tables from the Dragons region
The latest news, results and tables from the Ospreys region
The latest news, results and tables from the Scarlets region