Did you know you can simply post a link into the title of a new post, and Discourse will usually fill in the Title for you. The level of polish in Discourse is amazing – its a tool I always enjoy using every time I come here.
Another thing you can do is copy a link, highlight some text, hit past, and discourse will automatically format the text as a link – adding the markdown
[description text](URL) for you.
This is not a huge deal but so much nicer than having to highlight text, click on some toolbar button, past in a link, etc.