I am healthy now but how would I know if I have cancer?

[recondite7]

I am a healthy 22 year old guy, but it occured to me that if I had cancer there would be no way I would know about it until I got very sick.

What are some things I should do to protect myself against having undetected cancer for a long period of time? Would yearly checkups with bloodwork be the best thing to do to help detect cancer (or any other illness)?

It just seems like such an easier thing to fight when it's detected early and it seems weird to me that I am not doing anything of the sort. Thoughts?