Today is the final day in our series from sales trainer Jim Klein on how to become a great salesperson by changing your attitude. Check out these final four tips to live by, and be sure to read the other six from yesterday and Wednesday.

7. Treat Stumbling Blocks as Stepping Stones

So what if you didn't make that big sale, your girlfriend left you, your boss chewed you out or you made a big mistake. Your life isn't over. So keep your eyes on your goals.

What did you do right? What did you learn? How can you use this to make yourself better or stronger? What will you do different the next time?

Use it as a stepping-stone to take you to the next level. I've had some of my biggest periods of growth after major setbacks.

8. Help others to succeed

When you're gone, nobody will be talking about how much money you made or how many awards you won, they will be talking about the lives you touched and the difference you made.

Success is so sweet when you can share your knowledge and caring with others. Give of yourself. It will make the people you touch feel good and I know how it will make you feel. The sad part is when people come to the end of their lives and think about all the things they wish they'd done.

9. Reward yourself

When you sell that big account or reach a goal you set, reward yourself. Go buy something you've always wanted, take a trip, go out for an expensive dinner. Do something nice for you. You deserve it.

10. Tomorrow is a New Day

No matter what happened today, good or bad. You can go to sleep tonight knowing that tomorrow the slate is wiped clean. You get a fresh new 24 hours to accomplish anything you want.

Jim Klein is the president of From the Heart Sales Training, a company that wants to make all sales "from the heart," rather than "from the hip." Learn more and sign up for his Sales Advisor Newsletter at www.fromtheheartsalestraining.com