Try Administration Menu module for Drupal 6 and 7. It provides a really useful and time-saver interface for Drupal administrators.

A tip on how you can quickly edit your Node template file (node.tpl.php) to have content display only in certain View Modes. Using a simple .php conditional, you can restrict content from displaying in your Node template to View Modes such as Teaser or Full View.

This tutorial will show you how to add a region to your Node template. That is, how to display, or call, a region in your node.tpl.php (rather than in your Page template: page.tpl.php). This might come in handy when for instance you want to display a block somewhere inside your node. I used it once to add a region for blocks at the end of my node content, but before the Comment section (which in your page.tpl.php is generally included in the main content variable).

This tutorial will teach you how to create in Drupal 7 a Related Content block that shows content related to the node that is being rendered on the page. To do this you'll need the Entity Reference and the Views modules.

A tip: you can use the Module Filter especially when you have a big list of modules in your Drupal website and it becomes difficult to find newly added modules to enable.

A tutorial on how to add new regions to your theme page template (page.tpl.php) in Drupal 7. All you have to do is define the new region in the theme.info file and add it to the page template .php file to wherever you want the region to appear.

This is a quick tip for Drupal 7 to show how easy it is to see what is the Node ID of a given node if you use the module Pathauto or something else to create alternate URLs for your nodes.