It would be important to have a strategic career plan in place.
This can include deciding what your core values are in a work environment and do research on companies that would both align with your values and utilize your skills. It's important the atmosphere you would do best in rather than just applying to all jobs that take your skills.
Update your resume - check out a site like www.blueskyresumes.com and write a passionate and powerful cover letter sharing why you would be a good hire and have main points that can be tailored to solving the issues the company needs to hire you for. Each cover letter should be changed to reflect the job needs you are applying for but you can have a strong base.
Create a plan for moving forward once all your tools are in place and decide how much time you will spend each day on both networking, applying for jobs and reaching out to connections on networking sites like LinkedIn or Alignable.
Build a self intro for written and verbal use so people can understand what you are looking for and conversations can lead to introductions. Also, send an email with all your relevant contacts sharing what you are looking for and being open about asking for help connecting. People like to help those who are clear in their needs and helpful themselves.
Make sure to thank all who take the time to help you.
You can put all these steps in a simple plan and use it as your base for moving forward from freelancing to working in a company.