The only way I saw to was to go to your profile and then "Postings" it will being ALL your activity but it is identified on the right as "Post" or "Thread" .
If you float the cursor/mouse on your Username in the corner, then click 'Your Profile Page'. On your 'Profile' click on the "Information' tab, then click "Find all Threads by ________"
I always just click my user name at the top where I get that pop-up. Then there is a link on that pop-up that says your content that pulls up my posts Edit: I guess this shows all my posts and not just started threads