Citation is an important part of the genealogical process. It’s often one that can get left to the side during the research process. The hope of finding something or the excitement of having just made a discovery can result in details being omitted.
My own personal attempt to getting all the details for a citation without slowing down the research process too much is to take pictures or get images of the materials being used–especially when utilizing local records. Covers or spines of record books often can be used for this purpose. It’s a reason why when FamilySearch made microfilmed images of records they often filmed the cover.
Just make certain you get all the details. County record books in some locations include the name of the county. Others do not. That name is something you will want later. Record it while you are doing the research instead of wasting time later wondering where the record was obtained.