To find posts you've "liked", click on your username to get to your member profile. At the right, you'll see a box of "mini statistics". Click on the bolded number of "likes given" and you'll get a list of the posts you've liked.
And here's the one you clicked on:
greeting glue substitute by mpharis at Splitcoaststampers
Alternatively, you could do a forum search for "envelope glue" which should bring up the thread you were looking for.