Phil Davies' Blues go into the Arms Park clash having lost 10 of their last 12 matches and Easterby.
The Scarlets have also lost their last three games but they have won the last six clashes with the Blues and Easterby reckons his side can bounce back in the festive derby.
"Both our games against the Blues and Ospreys will have the same intensity and ferocity of any Heineken game, derbies are made that way and there won't be much in it or between the sides," said Easterby.
"We have three big games ahead of us and we can't afford to lose any of the positive momentum we've gained in the league so far.
"We will have to be better than last weekend and while we competed well for forty minutes, we have to start much more strongly which we've really looked at this week.
"The game at Exeter showed we're a team that can really attack and we were more creative with the ball and kept it moving. We didn't allow Exeter to set a defensive line but there were too many errors and we'll need to make sure we sure up our first quarter well on Friday night.
"It will be a big atmosphere at the Arms Park and our players have responded well away from home this year and we'll thrive on to going to three exciting grounds with big crowds to play our rugby over the next few weeks.
"The Blues have a number of impressive individuals in their side and some good young players coming through who looked comfortable in their European games - they came up against a pretty tough team in Montpellier and we know this is a crucial fixture for them on Friday.
"Phil's (Davies) sides are always well-prepared and I'm sure he'll have a couple of things up his sleeve. Ultimately, it will come down will come down who is the sharpest, who starts the best and ultimately how much we want to win it.
"I know all our players just want to get out there and play in these next three games, the short turnaround isn't going to affect them because mentally, every single one of us wants to show what we are about and give a much better account of ourselves."