In the past, I always felt that writer's block was my biggest problem. After finally finishing a piece and having it ready for publication, I find that finding an artist poses a much more harrowing problem, especially when low on funds.
At least with writer's block, my issues stem from self-induced obstacles, but finding an artist is beyond my control.
Over on Goblin Savant I had my friend Ian illustrate Gerald der Zeichner, the Goblin Savant. However, finding suitable art to portray my protagonist in Assassin Marked proved near impossible, and after months of searching, and waiting on the good graces of others, I decided to dust up my own photoshop skills. I created a very plain cover, but I like it.