when is a play ever such a glaring "give away" that it's worth placing the bet as soon as the line comes out?

I've noticed in cases when I feel this way and place the bet right away, either the line movements throughout the week is never significant enough to decide if it's a win or a loss, or worst I'd misjudged and lose the bet.

Other than this typical reason for placing early bets, when is it ever worth it?

And what good habbits you have that you think helps you win?



Thanks