Use this spinner wheel to get a song key. Writing songs in different key help build diversity and stimulate new song ideas
Maybe you’re brain fried but you feel like writing a song. Why not toss in a CD of someone who inspires you to write. Examine the style, the mixing, how the entire song is constructed, when each instrument blends in and out of the mix, etc. etc. You’ll find that many times you can get ideas from other artists. Allow yourself to be influenced by another artist.