Inverse procedure for me.
I start with the premise that I'm going to write an album of, say, 10 songs.
Establish a rough breakdown (x number of rockers, x number of ballads, x number of mid-tempo, x number of 6 8, x number of piano based ....etc)
Then find a theme to link at least some of the lyrical content.
BUt increasingly I guess the concept of an album is losing traction.