Discovering God's Will

Some Christians like to perform a "fleece-test" to discover God's will. Is this a good idea?  Here are some examples of what the "fleece-test" might look like:
I was thinking about getting a new camera and suddenly my old one just stopped working; clearly, God was leading me buy a new one.
I’m still not sure if I’m supposed to move to Canada, so I’m going to put my house up for sale. If it sells within a week, then that’s God’s sign I should go to Canada.
The fleece-test idea comes fro...