Great motivators are visible at the front and lead by their actions. Hiding in your office or mysteriously traveling all the time on unknown missions are sure ways to cause the focus of your team to disperse.
Motivated teams are the key to success at every startup, yet I still know entrepreneurs who gave an inspirational speech to kick off the quarter but haven't been heard from since, or don't realize that their actions are often more demotivating than inspirational.
If you have a habit of declaring milestones or changing them based on the crisis of the day, don't expect the team to remain motivated. Similarly, if the team isn't aware of the milestone and the value behind it, they are unlikely to deliver.
No matter how confident you are in your own abilities, you can't build and run a business alone. You need your army pulling you ahead, rather than holding you back.
Some entrepreneurs have a bad habit of taking personal credit for all improvements and innovations at their startups. If you penalize or ignore employee initiatives, you can be certain that they won't be repeated, and motivation for more conventional performance will suffer.