Some of my spells are Bardic in nature, that being so, they have to have tune that goes with them. I always think that any song or tune that can put you into a daydream is a bardic tune, the sort of thing that makes you loose yourself a little. So I take a tune from a musical, and put my own words to it. you can use this foe a spell, a blessing, a prayer. anything you want. But, be careful, every now and then you come across a tune that works really well with the words that you put to it. The power that comes out of this sort of bardic tune can make for more magic than is needed, you can go to far.
Many of my spells are wordless, which is hilarious for an English teacher, but I often find that the words block me, and so I use sound/chants, movement, and visualizations. I generally only speak out loud when I am working with others so we can stay syncronized.
Maybe BECAUSE of my work, I cant be relaxed about words, or because it is such a big part of my "normal" day, I need to choose other formats to shake myself out of beta brainwaves into alpha.
If I'm writing not ~just~ for workings, but for aethetics also (maybe it's a special public setting, or a holiday ceremony where a lil more razzle dazzle is nice ) then I rhyme. For just my personal workings, I just go with clear intentions