Who better to advise on life as an entrepreneur in Silicon Valley than the founder and CEO of a thriving startup, backed by Y Combinator?

By Cathy Han (Founder & CEO, 42 Technologies)

After launching 42 Technologies Inc. at New York Fashion Week 2013 and TechCrunch Disrupt New York, my team and I were accepted into the Winter 2014 cohort of Y Combinator, a Mountain View, California-based accelerator that funds startups from around the world, including Dropbox, Reddit and AirBnB.

During the program I learned so much and would like to share some of these insights with fellow founders.

1. Determination is the Biggest Predictor of Long-Term Success

Many inspirational founders shared their stories, including the CEOs of Pinterest and AirBnB. Nobody had an easy road. The AirBnB founders  – with a company now valued at $10 billion  – had a famous story of hot gluing 1,000 cereal boxes to pay expenses in the early days.

You can succeed, but often it is a matter of how badly you want to.

2. You Will Grow What You Measure

Take a sticky note, and write one goal on it.

Be specific. Now place it on your bathroom mirror, so that each morning you’re reminded of your No. 1 growth priority.

If you’re building a company, this should be a week-over-week metric such as users or revenue.

3. Do Not Mistake Activity for Growth

Startup founders often don’t know what truly constitutes growth. Adding features to your product is not growth. Neither is getting a fancy office or going to events. Adding customers and building product counts as growth –  that’s about it.

4. The Key to Growth is Progress

If you’re not moving forward, here is a way to get tasks done through a life hack called workstation popcorn:

You start with a list of three tasks, each with sub tasks. You go to three coffee shops and only move to the next one when you’ve done a task. Make progress each day and you win.

5. The Winner Between the Alligator and the Bear is Determined by the Terrain

Negotiate on your territory. Play up your strengths.

6. Make Decisions Quickly

Time is a cost. There are 24 hours in a day, and only about 10 percent of the information needed to make most decisions. Understand the magnitude of decisions you are required to make and prioritize accordingly. Train yourself to become decisive, so you can move forward with execution.

7. Do Not Focus Too Much on Competition

If I decided to become a basketball player tomorrow, do you think it would affect LeBron James’ career?

Ignore the noise, because what others are doing is out of your control and they’re probably amateurs. Be aware of the players in the space you are in, but focus on getting to the top of your game.

8. There is no Substitute for Hard Work

When we first started market testing 42, I spent weeks walking in and out of stores asking to speak with every associate and store manager. It was tough, but also gave me the most eye-opening insights.

There’s no way around pushing code or making sales calls. The good news is that the tougher it is for you, the more difficult it is for others to replicate.

9. Opportunity is Everywhere

The first time I visited Silicon Valley I was very disappointed. There was no teleportation, no wireless ports, not even robots who greeted you at reception. Now I see it as great news, it means there are still countless opportunities for you to introduce ideas that will shape our future. No excuses, get building.

This post originally appeared on Medium.

What tough lessons has Silicon Valley taught you about being an entrepreneur?