Freestyle crochet

I spent a few hours today crocheting a multicolored square. I didn't know what I would use my square for; I just wanted to see how the colors looked together. But now I think I will use it on the back of a freeform vest I have been working on for awhile. It's one of those 'dead' projects that's been hanging on my bathroom door for a year and I'd really like to finish it. I just couldn't wrap my mind around it. I think I need to start sewing the motifs to each other and see just how many square inches I've already covered. And I need to get some sense of where I need to make more shapes and what basic shape those need to be. Right now the only thing holding the parts together is safety pins.