Having been writing lyrics since before I wrote songs, (backing to 1974), I've had a large pile of partially completed text for decades.
That made things easy.
The supply has diminished and has been cherry picked to oblivion. I've been writing what comes to me and, of late, since I've been working on melodies in the absence of words, writing what repeated listening to the melody suggest.
I've written a couple of autobiographical songs, a few about domestic circumstances and a bundle about the way of the world so I don't have A way.
One strategy I do employ when writer's block settles in is to rewrite a classic lyric using a different perspective or bouncing words off a classic melody. This has produced a couple of good songs but, more importantly, gets me started again.

Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe