Performance
Upgrading Drupal Contributed Modules
Staying current with Drupal contributed module releases' is one of the biggest challenges and pains when working with Drupal. Hopefully you've upgraded all your contributed modules at the very least to the latest security release. If you don't have experience upgrading a Drupal module this article is for you.
Using !important in Your CSS
In Cascading Style Sheets (CSS), the default behavior is that the most specific and last-defined rule takes the priority. That is the main reason to use CSS; you can specify one rule and it will apply (or cascade) to all instances of that element.
This also makes it very easy to change or update the look and feel of your site since you only have to edit one file and change the rule of one element. Take the following example:
p {color: black;} /*all instances of paragraph tags will be black */
