One of my favorite keyboard shortcuts in Windows is CTRL+NUMPAD+Plus.
Often, when viewing a folder with the details view on, the columns might be sized badly. The filename column might be too narrow, cutting off the names. Or another column might be too wide.
You can get Windows to automatically resize the columns to fit the widest item for the column, so no data is lost and only the space needed is taken. To do this, press the CTRL key while pressing the “+” (plus sign) key on the number pad. Volia! The columns are resized.
You must have focus inside the details view beforehand for this work. This tip works wherever the Windows ListView control is used. So you'll find it works in many other software packages as well. Sadly, many applications have custom list and grid controls that don't recognize this shortcut. For example Microsoft Outlook.