There's no right or wrong way to use these cards.  You could try flicking through the pack and using any card that strikes a chord.  Alternatively select one at random and think of possible ways it could relate to your problem.  

Try not to be too literal in your interpretation, and don't be afraid to follow or build on your initial thoughts, however irrelevant they might at first seem.  It's often these meanderings that can lead you to a new solution.

Remember: these ideas worked for other people, so there's no reason why they shouldn’t work for you.

Finally, enjoy yourself and have fun: too many people make problem solving such hard work!