How do you keep track of your comments in issues on GitHub?

Search for commenter:username in the main Github search box.

For example commenter:gavinandresen

To see recent activity, select Recently updated from Sort dropdown

You can also narrow the search: is:issue commenter:gavinandresen

I have also been very frustrated when I could not find an issue that I have commented on a while ago. I even did not remember the project it was in. I knew only the problem I was referring to.

Then, I went to the Notification settings on Github and saw there is an Include your own updates option that is unchecked by default.

Once you check it, Github will send you an e-mail notification about every comment or PR you make. They you probably want to add an appropriate label and filter for emails so Github messages do not clutter an inbox.

My life has changed since then. Now, every time I want to find something I have written on Github, I just search for it in the e-mail notifications.

You can view all the issues on Github you have commented on by going to https://github.com/notifications/subscriptions and selecting Reason as Comment.

This will show all the issues that you've commented on.

You can also filter the issues by selecting other reason such as Assign, Author, Manual, Mention, etc. but you can select only one reason at a time. Also, you can filter the issues by repository by selecting the concerned repository from dropdown after clicking Repository