Here are some bugzilla links that I find useful.
Search for bugs
Enter new bug
Frequently reported bugs
My review queue
My review requests
Tim's review queue
Tim's review requests
John's review queue
John's review requests
Robert's review queue
Robert's review requests
My first bugzilla comment that can still be seen. (I previously contributed under jonathan@jwatt.net, but justdave deleted that account at my request. Anyone know how to search for comments made by a deleted account?)