Here is the age-old simple dishcloth pattern although I've used this same pattern to make shawls and baby blankets:
Cast on 3 stitches.
Knit 1, Yarn Over, Knit remaining stitches.
Continue 2nd line until you reach desired size. (45-50 stitches for dishcloth with worsted weight yarn) (Bind off here for triangle shaped shawl.)
Knit 1, Yarn Over, Knit 2 together, Knit until 3 stitches remain, K2Tog, Knit 1
Continue last line until 3 stitches remain, then bind off.
Such a simple, practical, and even meditative pattern ...