I was wondering if anyone knows any good techniques to perfectly line up from base to final?

Some of the students I teach are still overshooting and some undershoot and I'm running out of different explanations and was wondering what advice you have.

Also, I was wondering how pilots who fly faster jets or heavy iron do it? For example, I know in the larger Boeing planes there is a ground track trend vector "noodle" that you can use that helps you make a nice 90 degree turn without overshooting or undershooting.

I'm talking about doing this pure visually without using a navaid like a localizer or VOR on the field or GPS.

Thanks.