For example, if the saint was St. Christopher, then you may be on your way to taking a long journey.
If the saint was St. Jude, something wonderful and totally unexpected will happen.
If the portrait was of the Virgin Mary, someone will intercede for you in a disagreement and put it to an end.
Icons in general seem to bring a message that coming changes in your life, however stressful they may be, are beneficial and can be dealt with fairly easily.