We all know the statistic. Depending on which research study you cite, somewhere around 75 percent of new startups fail. Some failure is due to preventable mistakes by first-time entrepreneurs. Other types of failure are more industry specific, where the cause is out of the hands of the founders.

Paul Graham is famous for saying that the biggest killer of startups is that the founders end up building something that their customers don’t really want. Below, I’ve compiled my list of common startup mistakes to avoid from being a part of failed companies and learning from the failure of others.

1. The need to be “right.”

2. Not focusing on problems.

3. Caring too much about business plans and powerpoint presentations.

4. Staying inside the building.

5. Not accounting for taxes.

6. Thinking you need more money.

7. Focusing on money more than learning.