This lets the students read them at least once before coming to class. Thus, I usually have the chance to exploit the text fully.
Some texts easily avail themselves for some grammar practice.
Rather than breaking every sentence into its constituents, I select some parts, or deal with the problem sentences students ask about. If this lasts long, however, they get bored. I can also suggest some books on exploiting reading texts for their grammar and organization, too. I observe that this is much more helpful than teaching the grammar in the traditional way. I'm about to start trying.