Canon EF 85mm f/1.2L II - This lens is probably the most amazing lens I've ever used. It delivers great color, great contrast, razorblade sharpness even at f/1.2 and it offers THE best bokeh ever. Simply stunning. It's the ultimate portrait lens but using it for other means will deliver you images no other lens can give you.
Probably the cheapest, reliable shutter release you can get for a Canon SLR — The NEEWER Timer Remote for Canon 50D, 40D, 30D, 20D, 10D, 5D,1Ds Mark III, 1D Mark III, 1D Mark II N, 1Ds Mark II,1D, 1V, EOS 3, D2... $15
A modern day update to a versatile, compact and lightweight wide-angle lens, the EF 35mm f/2 IS USM is incredibly bright and offers image stabilization, superb image quality and construction perfect for use on any EOS digital camera.