practice practice and rehearsh..
A tip I heard of remembering lyric is to visualize them..
As I walked out in the streets of Laredo
-see yourself walking down a street-
As I walked out in Laredo one day
-look around the old western town-
I saw a young cowboy, all dressed in white linen
-see a mummy laying across a horse back-
Dressed in white linen, as cold as the clay
-see white linen turning blue-
Does it work.? Maybe for some folks..!