Being successful often means learning from those who have already achieved their goals. Having a mentor is an amazing blessing to an entrepreneur, but not everyone can find one in person.If you haven\u2019t yet found your personal business guru, here are 21 tips for young or aspiring entrepreneur to help get you started.1. Challenge yourself.Richard Branson says his biggest motivation is to keep challenging himself. He treats life like one long university education, where he can learn more every day. You can too!2. Do work you care about.There\u2019s no doubt that running a business take a lot of time. Steve Jobs noted that the only way to be satisfied in your life is to do work that you truly believe in.3. Take the risk.We never know the outcome of our efforts unless we actually do it. Jeff Bezos said it helped to know that he wouldn\u2019t regret failure, but he would regret not trying.4. Believe in yourself.As Henry Ford famously said, \u201cWhether you think you can, or think you can\u2019t, you\u2019re right.\u201d Believe that you can succeed, and you\u2019ll find ways through different obstacles. If you don\u2019t, you\u2019ll just find excuses.5. Have a vision.The founder and CEO of Tumblr, David Karp, notes that an entrepreneur is someone who has a vision for something and a desire to create it. Keep your vision clear at all times.6. Find good people.Who you\u2019re with is who you become. Reid Hoffman, co-founder of LinkedIn, noted that the fastest way to change yourself is to hang out with people who are already the way you want to be.7. Face your fears.Overcoming fear isn\u2019t easy, but it must be done. Arianna Huffington once said that she found fearlessness was like a muscle \u2014 the more she exercised it, the stronger it became.8. Take action.The world is full of great ideas, but success only comes through action. Walt Disney once said that the easiest way to get started is to quit talking and start doing. That\u2019s true for your success as well.9. Do the time.No one succeeds immediately, and everyone was once a beginner. As Steve Jobs wisely noted, \u201cif you look closely, most overnight successes took a long time.\u201d Don\u2019t be afraid to invest time in your company.10. Manage energy, not time.Your energy limits what you can do with your time, so manage it wisely.11. Build a great team.No one succeeds in business alone, and those who try will lose to a great team every time. Build your own great team to bolster your success.12. Hire character.As you build your team, hire for character and values. You can always train someone on skills, but you can\u2019t make someone\u2019s values fit your company after the fact.13. Plan for raising capital.Richard Harroch, a venture capitalist, has this advice for upcoming entrepreneurs: \u201cIt\u2019s almost always harder to raise capital than you thought it would be, and it always takes longer. So plan for that.\u201d14. Know your goals.Ryan Allis, co-founder of iContact, pointed out that having the end in mind every day ensures you\u2019re working toward it. Set goals and remind yourself of them each day.15. Learn from mistakes.Many entrepreneurs point to mistakes as being their best teacher. When you learn from your mistakes, you move closer to success \u2014 even though you initially failed.16. Know your customer.Dave Thomas, the founder of Wendy\u2019s, cited knowing your customer as one of his three keys to success. Know those you serve better than anyone else, and you\u2019ll be able to deliver the solutions they need.17. Learn from complaints.Bill Gates once said that your most unhappy customers are your greatest source of learning. Let unhappy customers teach you where the holes in your service are.18. Ask for customers\u2019 input.Assuming what customers want or need will never lead to success. You must ask them directly, and then carefully listen to what they say.19. Spend wisely.When you spend money on your business, be careful to spend it wisely. It\u2019s easy to spend too much on foolish things and run out of capital too soon.20. Understand your industry.Tony Hsieh, the founder of Zappos, once said, \u201cDon\u2019t play games you don\u2019t understand, even if you see lots of other people making money from them.\u201d Truly understanding your industry is key to having success.21. Deliver more than expected.Google\u2019s Larry Page encourages entrepreneurs to deliver more than customers expect. It\u2019s a great way to get noticed in your industry and build a loyal following of advocates.Being a successful entrepreneur takes a lot of work, a lot of vision and a lot of perseverance. These 21 tips, from entrepreneurs who have already found success, will help you navigate the path much more easily.