There's a new type of wizard in the TYPO3 core called "suggest", which has been added to TCA with 4.3beta-1. This wizard adds a magic input field for autocompletion to fields of type "group" or "select", also called find-as-you-type. It helps to quickly find a record by typing its name/title in the suggest field, getting an AJAX dropdown list with all possible results. This article demonstrates how to implement this wizard in your TYPO3 extension.
When editing a page in the TYPO3 backend, there's a whole bunch of save buttons available. The "save document and view page" button allows to save the content and open a preview popup with one click. Unfortunately this does only work for regular pages and content elements, but not for database records of extensions which are stored inside sysfolders. The following tutorial describes a way to get that button also running for those records.
Heatmaps can be used for website usage analysis. They appear to be very easy to read and comfortable to understand. But in fact it's not that easy to assure a proper environment and to get reliable results.