Don't we need to keep busy to be creatively productive? A number of psychologists and artists say daydreaming is actually a way to enhance creativity.
Psychologist Dennis Palumbo notes, “Some people call it puttering, or screwing around, or just plain goofing off. Others, of a more kindly bent, call it day-dreaming. Kurt Vonnegut used the quaint old term ‘skylarking.’ What I’m referring to, of course, is that well-known, rarely discussed but absolutely essential component of a successful creative person’s life — the down-time..."
Via Douglas Eby, Carol Sanford