I need album cover ideas?

Okay so I've made an album (Not from an actual record label), but at home on my computer to have people listen to my music & promote myself. My only problem is I'm having a hard time coming up with an album cover. I'm calling it "Collision" because it's a lot of different type of songs & styles all meshed into one cd, & it has a large pop-rock influence to it. With that given information, does anyone want to give me suggestions or ideas for the album cover? I'm a solo artist by the way(: