At the top of every forum, there is a new set of links that say "Show Topics: You Replied To | You Started" - These links will show you just the topics you replied/started in that particular forum:

And under your "My Account" drop down is the "My Topics" link which will show you all topics you've ever started sorted by most recent reply:

And remember, anytime you see a topic marker with a little paperclip icon in the corner like this:

In future releases of Dream.In.Code, there will be a consolidated view across all forums, but please take advantage of these in the mean time. Thanks!