This is a great question! In truth, there is no one-size-fits-all solution. Consider the following points:
1. Trial and Error
It may take you a few false-starts (and a few bad jobs) to figure out how to forge a career path. While this can be discouraging, I have found it helpful to examine which parts of each job I liked the most. Determine whether the more enjoyable aspects we part of your prescribed job responsibilities or if they were opportunities that you created for yourself. For instance, if you work in retail, do you enjoy working with customers and selling or do you prefer creating more efficient ways to maintain inventory? Take these concepts, such as "sales", and throw them into Google with "career path" tacked on the end. This is a great jumping-off point for discovering what kinds of jobs are out there.
2. Make a Wish List
Some great career advice I once received was to think beyond the role and also dream about my work environment. As you grow in your career you will discover that every company does business a different way. So, considering that you will spend a sizeable portion of your week and even your life with a company, make a wish list. What do you see yourself wearing to work-- jeans or a suit? Do you see yourself having a flexible schedule or do you prefer the structure of going to the office every day? Would you prefer to work with a smaller company or meet someone new every day?
Your wish list will continue to change with each job you take but, always keep your deal breakers in mind when evaluating an offer and when interviewing with a company. No paycheck is worth your happiness!
3. Intern and Shadow
Interning is a great way to learn what skills employers are looking for new hires to walk in the door with and begin developing them. Take detailed notes and journal your experiences every day. This will be very helpful while creating your resume as you will forget some of the things you accomplished during your internship.
Shadowing is my final advice. This is your chance to see yourself in 10, 20, or 30 years. Ask the person you're shadowing about their career paths, their false starts, and what their favorite and least favorite parts of their job are.
I wish you the best of luck, Eve. Keep asking questions like these and searching for the answers.