Did you know that if you want to make a selection in Photoshop with the regular Lasso tool (instead of the freeform ones you normally get using the tool), you just hit the Shift + L key combo, which gives you the Polygon Lasso tool? The lines you get will be straight and connected to each other. This is perfect for selecting straight edged objects in your photos, such as buidings, cars, etc. Hitting the key combo again gives you the Magnetic Lasso tool.
