Concentrating in Salah and really focusing is very important but many of us lack khushoo in Salah. Check these tips to increase khushoo!
We should take a break from the dunya and listen to the adhan so that we are in the mindset of Salah.
We should then pray the individual sunnah Salah before the prayer so that are minds are ready for the prayer.
Then we should sit down and make dhikr until the imam appears so that we are fully at peace to pray.