Coffee can planters --cheap idea for planters. Similar to the one where you screw a coffee can to a post to keep your garden trowel and gloves in and then put the plastic lid on to keep them clean and dry
Old filing cabinet + spray paint = raised planting bed. I might add that packing peanuts make a good filler for the bottom of deep containers, then just put your potting soil on top. Makes for good drainage too.