Especially for sources in footers I often want to avoid re-typing a complicated title of a document that I found on the web. Copy-paste of the text also copies some of the text formating. Solution: copy the text, paste it into "Note pad" (the standard text editing utility that comes with Windows), select the text again and paste it into a PPT text box. I would be interested if other people have faster solutions for this.
UPDATE: Remy got the solution in the comments: copy any text, then select Edit and "Paste Special" and select unformatted text. Thank you!
UPDATE 2: Glen Turpin recommends PureText (see the comments).Thank you!

If you liked this post, why not subscribe to daily updates about presentation design via email? Just blog posts, no spam, or you can follow Jan on Twitter to never miss a thing.