Personally, I don't "do" all the recommended tests that are available from the medical industry. But lots of people swear by them and the CDC claims that colorectal cancer tests will reduce our risk of getting this awful disease. They especially recommend them if:
1. There is a history of colon cancer in your family, or
2. You have a personal history of IDB (inflammatory bowel disease)
One of the positives of these tests is that they're only done every 10 years if there are no polyps found.