More advanced methods have kinks in the line - in technical terms, dodges, places, points and fishtails.
However the process of memorising the method is the same - learn the line. To the left is a picture of Cambridge Surprise Minor with the path of the 6th bell drawn in.
Note that this is just the first "lead" of the method (a lead starts with the treble leading twice) - there are 4 more of these leads to learn (120 changes in total). We can also extend the method using a special call "bob" or "single" which act like a points on a railway track allowing us to ring for longer. We often use this to ring a "quarter peal" (about 45 minutes of ringing) to celebrate a special occasion. On really big occasions, we ring a peal (3 hours of ringing and used sparingly out of consideration for our neighbours).