Absolutely a must to have little notelets made up and saved somewhere for those emergencies.
Left blank so can be used for any occasion and then when the need arises just add thank you, get well soon, thinking of you, sympathy...
This style seems to work sophisticatedly with any occasion too.
I did bundles of these for a recent craft fair and they did quite well as well as giving some packs for christmas presents.
The tree is the (need to make sure I spell this right) Arboscello Tree Die, by Memory Box and it is stunning. It's my favourite die by a long shot at the moment, definitely one I recommend as it's perfect if you're in a hurry to whip up a quick card and still look gorgeous!!