I am not a designer, nor will I ever be. Things look perfectly fine to me a very long time before they look OK to anyone else! Along with that, I don't always find it easy to tell fonts apart. I can do serif-ish and sans-ish but if the fixed-width font has serifs on it I sometimes miss that detail if I'm not looking for it - which also means that I have no idea if I've loaded the fonts I was thinking of or not.

To get around this, I test everything by switching the font to Sniglet from the League of Moveable Type. It's ... umistakable!

Take this simple presentation slide:

Maybe you can tell that this has correctly loaded my preferred font (Gentium, in case you're interested) rather than fallen back to a Times New Roman or something. I am never really sure about it (or at this point I'm completely convinced that I don't know what I'm doing, either way) so I test by loading a different font by the same mechanism: Sniglet.

So NOW I can tell if the font has loaded because even I can tell Sniglet apart from a default/fallback font!! I also love it, it's cute and fun, and makes me smile :) What top tips do you have for catching errors that you might otherwise overlook? I love little tricks like this so leave me a comment if you have something to share!