Alot of people complain about no Khushu n Khudhu in Salah. Here is an easy way to get it. If you do it inshaAllah you will develop concentration towards Allah quickly. 1) Muraqabah - 5 mins before salah sit and close your eyes. Turn your attention towards your heart and make it do Allah Allah. Increase the time when u get used to it. 2) In salah, imagine that theres nothing in the whole universe except you and Allah. And its done. If you loose concentration in salah towards other things then bring it back towards Allah again. If thoughts come, let them pass. Don't even think about them. Don't even think of removing them. Hope this helps.