It's natural for us to not jump into the water to cross rivers. If you go to a known route, you know all the bridges that take you to your destination. You know which bridge will have less traffic. If you go to a new route, you learn about new bridges. More you travel, you get better at finding shortcuts. In geometry, practice is analogous to travel. More you practice, you get better at finding bridges and shortcuts to take you to your destination as fast as possible. There is no alternative for practice.