Bookmarks are now called subscriptions
If you look up above you will see Thread Tools in the tan bar just above the first post and under the Reply to Thread
Click on Thread Tools
you should see a menu list
choose and click on Subscribe
to go back and find your subscriptions
Click on Home
the sublinks will show up in the same color bar under home
Find quick links and click on it to get the menu
Then click on subscriptions and you will get a list of the threads you subscribed to
Not hard just takes knowing what to click on.