Haiku need not refer to the
seasons, though that's
traditional.
Another tradition of haiku is to invoke metaphor.
beads of dew shining
caught and held with no escape
slaves in spiderwebs
Personally, metaphor leads to puns and wordplay.
my hand on your neck
working a difficult fret
A guitar's kapo
Further, a metaphor between the daily life of man and the imagery of nature is an interesting challenge; seventeen syllables isn't much room to maneuver.
tall wrinkled mountains
soft white blankets each dark fold
underwear and socks