Modes and Key Signatures have a variety of different characteristics and are great for outside-the-box songwriting. Here’s a cheat sheet to remember them!
You can also vary the motif by lengthening or shortening the notes within it, and make it change direction by inverting it, creating its mirror image. You can add notes to extend it. And later in the song, you can even create a new motif, usually for the chorus. Contrast is the songwriter’s friend.