How do you make bends in different directions?

I  am creating a flow tray out of sheet metal. Each side willbe bent up. At the end of this piece the sides will be bent out andthe bottom will be bent down. I have no problem making a bend butwhen there are multiple bends going different directions I am lost.I am afraid I have not had the chance to take the sheet metal classbut do intend do. Until then help would be greatly appreciated. Ican not get all of these bends to take place. Can you help? Thanks.Susan