Many Psalms refer to enemies, and while I can't think of anyone in my life that would fit that term, I believe that there are plenty of enemies in the spiritual world for me. Not to mention my own sinful tendency, probably my greatest enemy.
Although not necessarily written to be interpreted this way, I often find Psalms that more clearly express what I'm going through if I put them through that filter. Suddenly the Psalms become very easy to "pray along with" as I read them. Maybe you'll find the same to be true in your experience.
Listen to my voice in the morning, Lord. Each morning I bring my requests to you and wait expectantly.