The great thing about a digital SLR camera is that you can change lenses based on what you are shooting. Unfortunately that gives dust a chance to get inside your camera and on your sensor. There is nothing more frustrating than looking at pictures and seeing dust spots on every frame.
Most cameras have some sort of auto-cleaning function, but it rarely gets rid of all the dust. You can open up the camera and try to blow it out with a manual air squirter. Local camera shops can usually do a good cleaning for around $50. Lastly, you can send it back to the manufacturer though this is fairly expensive.
Delkin Devices Digital SLR SensorScope Cleaning System gives you the tools to clean the sensor yourself. The SensorScope itself has a 5x magnification lens with 4 ultra bright LED lights so you can see exactly what gunk is on your sensor. Plus there is a battery powered sensor vacuum to suck out dust and 24 wands and fluid to wipe any remaining dirt off the sensor. This kit easily pays for itself the first time you use it as you don’t have to take your camera to the shop and leave it while they clean the sensor for you. If you have a DSLR, you’ll definitely want to have this kit!