The list library defined in SRFI-1 contains a lot of useful list processing procedures for construction, examining, destructuring and manipulating lists and pairs.
Since SRFI-1 also defines some procedures which are already contained in R5RS and thus are supported by the Guile core library, some list and pair procedures which appear in the SRFI-1 document may not appear in this section. So when looking for a particular list/pair processing procedure, you should also have a look at the sections Lists and Pairs.