How to create Dashboards in OBIEE?

OBIEE The final skills, Creating great dashboards.
Most project we spend 70% on getting the data (ETL), 20% on creating the repository and 10% percent on creating the dashboards. Regarding step 1 and 2 most of us have enough skills do them successfully. The final step, creating the dashboard, is something we often take to light hearted.

Let's make a bold statement here: 60% percent of the dashboards we create, within six months, aren't used in the way we intended them or even worse aren't used at all.

Why? Most of them don't communicate to user in the most effective way. The user can't find what he is looking for at glance. Either we tend to overload him with data or present it in a non effective way.