You can cover these bugs in many ways :
If you're a developer, you can help out reviewing patches and getting them uploaded.
If you want to just confirm new bugs, you can do that.
If you've experience with a certain package and want to triage bugs you can do that and forward them upstream if necessary.
If you know your way around Ubuntu quite well, you can help assign bugs to the right package.
the Complete thingy on Ubuntu Site link is h3r3