What is 5-A-Day?
We, that means everybody, will do 5 bugs a day - every day. With only five bugs that everybody looks at every day, we will cover a lot of ground.
What you can do? That's up to you, your interests and your abilities.
* 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.

Ubuntu正式对自身的Bug们宣战了，不过有些Bug恐怕不是Ubuntu社区能解决的——比如臭名昭著的ATI驱动。
每天5个Bug，一年要1825个，这恐怕不是only的问题了……