If you are talking about getting across to stop a one-timer off of a quick pass, well a desperation dive coupled with a blood curdling scream is always good.
If I'm just following the play across I don't go straight across the crease. I usually do it in two steps. I t-push from the post to the top of the crease, and then t-push backwards to the opposite post. When I say t-push "backwards" I mean that I'm skating backwards with the heel of my skate pointing where I want to go. I'm essentially following the arc of the crease. and since I'm not turning my skates at 90 degree angles I stay pretty square to the puck and able to react. I guess that's not really t-pushing, but you get the idea.