This video will certainly explain some imaginative circuit hacks which will give you concepts on just how to design circuits with just the parts you have on hand.
Famous Words of Inspiration..."A silly idea is current that good people do not know what temptation means. This is an obvious lie. Only those who try to resist temptation know how strong it is... A man who gives in to temptation after five minutes simply does not know what it would have been like an hour later. That is why bad people, in one sense, know very little about badness. They have lived a sheltered life by always giving in."