Reply to Just cant master doing a simple mix, any tips?

so i have been djing for a while now and i have dont several mixes, and the sound ok, but i sometimes sit down to do a simple mix (a pratice session) and i just cant mix, i dont know if its my song choice, or the if theres something i am doing wrong; i have watched plenty off videos! Sorry if this sounds a bit but it just fustrates me, any tips?