I would strongly suggest you go on to eventually earn a bachelor's degree. Many companies will not hire you without one. Apart from that, I would recommend reading industry-specific magazines, technical books, and newsletters. For the dedicated, I also recommend attending local CAD-related user groups, and either seminars or conferences, as they become available. You must continue your education to survive professionally.
Education is a very important ongoing process.
The road of continuing education should be one that benefits you personally and professionally. Attention should be given to market trends and career opportunities in your respective field. Gaining experience through your job is a valuable education in itself, but it may not be enough.