Stampsmith has an anything goes theme as long as at least one Stampsmith stamp is used. Mojo Monday has its round or square sketch theme. Marks Finest Papers Simple Salutations has an anything goes theme as long as there is a sentiment on the card.
As you see, I followed the square card sketch for Mojo Monday. My focal image is Mopsa (from Shakespeare's Winter's Tale) which is on the Julia and Friends stamp sheet from Stampsmith. I colored her with Ranger dye inks using nibs. Her background was done with a stipple brush. My background is from a Tim Holtz paper stash and the sentiment is a Club Scrap stamp.