I've been doing a number of small studies on Gessoboard, a commercial preparation of acrylic gesso-primed hardboard. They are done quickly, usually only an hour or two at most, and measure either 8x10 or 9x12 inches. I call them Apuntes, Spanish for notes or sketch, after having seen hundreds of Joaquín Sorolla's studies on cigar box lids, at an exhibition in San Diego in the early 1990s.
As in Sorolla's example, these are sometimes worked up into larger paintings, but more often than not they stand by themselves. They are notes, a term that has both literary and musical connotations. They are intended to infer more than they actually say.