When you are creating mockups for a redesign always use Real Content. I consistently find that people who use lorem ipsum design pages that look great in the design phase but become problematic when it comes to implementing them in the real world. The reason being is that lorem ipsum can be set to any length that looks great in a mockup. However, real content is less than perfect and often comes in lengths that can quickly break your best case scenario. Using real content will provide a design contraint that will make your site better in the long run.

For those that build sites in multiple languages, use at least 2 languages in your mockups. German is usually a great test because it tends to be much longer than English. If your site supports any of the Asian languages you’d want to test those too as they tend to have some unique design contraints as well.