I am using full-disk encryption pretty much set up like described in this guide.

I works nicely except for the fact that I am bad at typing passwords. So occasionally I am typing it wrong and grub drops me to a rescue shell.

I then hit ctrl-alt-del to reboot, which feels unclean and is a bit annoying as it takes a couple of seconds. So I was wondering if there was a cleaner way, such as configuring grub to allow multiple attempts or something similar.

Obviously a minor issue, but if anyone knows a little trick please share it.

I don't know how it could be done, although it may be possible to construct a script to add to /etc/grub.d/40_custom that would work.

As an alternative, grub can remember the last entry you booted from and use it as the default for the next boot. If you are interested, I found instructions at the Arch Wiki . Scroll down to Section 10.2 for the additions to make to the grub config to save and use the default password.

Don't forget to run update-grub as root for the changes to take effect.

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Don't think I understand the suggestion. At the time that I am typing the wrong password scripts in this directory would not be decrypted yet, so how would any changes in /etc change anything? I am probably missing something, can you elaborate a bit more?
I have to type my luks password before the grub menu even shows.
The boot directory is part of the encrypted partition. So the boot entry is only chosen after I have typed the correct password. In fact I only have one system on this computer anyhow, and have the timeout set to zero. So I don't even get to see the grub menu anyways...