Improvements in SP1 for SharePoint 2010, most notably the Site & Site Collection Recycle Bin and visualized storage space allocation.
How to set up custom site columns to work as metadata refiners for search.
How to build an interactive business process map using a SharePoint list.
How to use association columns in SharePoint workflows.
Here is a simple way to add in the logged in users profile picture right before or after the users name in the SharePoint 2010 ribbon.
Add data to SharePoint lists via e-mail.
Remember the good old days, before SharePoint 2010, when a dropdown on the top right of a List View Web Part (LVWP) allowed you to select different views, quicly and easily?
A look at selectors, attributes, and traversing with jQuery in a SharePoint context.