Something I feel is worth mentioning is that the bird may be one or two degrees off in the end of a long flight due to IRS drift. So, while it helps a lot and, in conjunction with correct flight plan sequencing giving you the lateral deviation from the extended runway centreline, will help you avoid any gross error - do not forget to look out of the window. That's why it's called a visual approach. Also, don't ever try to fly one with any AP mode. The FCTM tells the story really well, giving you the ground rules to stick to. From there onwards, it's a matter of practice.