1. Use extract. Use extract. 

There is nothing near the effectiveness of an extract. There is nothing else. Extracting the best bet is if you don't necessarily need live INFORMATION.

1. Limit your dashboard to respond to only one situation completely. 

The easiest thing is for a dashboard to explore a single situation in its entirety. You might not be looking at only one scenario if your dashboard has six sheets, five actions, and 3 FAST filters. Remember, whether your solution is elegant and comprehensive, if it doesn't work as fast as the user wants it, he or she won't use it. I would not advise your dashboard to be butchered so heavily that it can not manage a whole situation. Why did you use your dashboard if the user has to go somewhere else to look for the response?

1. Limit the information entered on each worksheet.

If you don't plan to use a set of rows, you should filter them as soon as possible out of the information set. If you have a custom SQL request that filters out your table and wants to view sales in the US only. Try to use a context filter if the filter is worksheet dependent. See my other Types of Filters post in Tableau for more data on filtering. You can also press on a Down arrow in order to conceal all fields you are not using from any of your worksheets. You can select "Hide All unused fields." I am not sure if effectiveness improves, but I just think that less information is always expected to enhance effectiveness. 

1.  Remove any value-added parts.

While esthetic is essential to create a usable dashboard, it is not worth losing effectiveness to unimportant objects. In reality, by adding a purely esthetic item, it would be better to add more features.

1. Remove from visualization any non-essential elements. 

This relates to the values on the pages, filters, and detail LEVELS. If the user only sees if he scrolls over one point, he does not add importance to the original look. But, I leave that as the final step because it ought to be a LAST RESORT. In most cases, if you create dashboards, you can save a little bit of anticipation. Decide what tale you want to say, and just say it. A tiny dashboard is much simpler to add than to knock a big one