Admit where you are.
Let's say you're on a weeklong bicycle trip. You planned to make it to your next stop before dark, but a flat tire delayed you by a few hours.
Even though you planned to get further along today, the truth is that pursuing that plan would be dangerous now.
Similarly, an idea you can draw on paper in one day may end up taking you a lifetime to make real. With the ability to make plans comes great responsibility.
Think about what you can do with the time and resources you have. Filtering and being realistic are part of the job. Keep reevaluating where you are in relation to where you want to go.
Be careful not to fall in love with your plans or ideas. Instead, fall in love with the effects you can have when you communicate clearly.