Shortcuts

Overleaf Keyboard Shortcuts - Overleaf, Online LaTeX Editor helpfully links to a PDF, screenshots here:

It seems to have cool multi-cursor functionality that might be worth learning sometime.

Kurz und gut

• Bold/italic work as expected, <C-b/i>. Same for copypaste etc.
• Advanced reference search: is cool.
• Comments:
  • <C-/> for adding %-style LaTex comments.
  • <C-S-c> for adding Overleaf comments

Templates

Overleaf has a lot of templates: Templates - Journals, CVs, Presentations, Reports and More - Overleaf, Online LaTeX Editor

If your conference’s is missing but it sends you a .zip, you can literally import it as-is in Overleaf, without even unpacking. Then you can “copy” it to somewhere else and start writing your paper.