The specific websites and groups would depend on your specific area of interest, however I would explore the following avenues for any interest:
- Social Media has become very relevant and even the epicenter of networking. Be intentional about your brand and the people you follow, the people you allow to follow you, the posts that you are putting up, the posts that you are liking, etc. LinkedIn is more for business connections traditionally however all social media outlets have found a way to incorporate business networking as well.
- Chambers of Commerce are a great way to meet all of the local business owners in your field of interest to network and explore
- Referrals remain an under utilized avenue here, once you have a strong relationship or group built, ask for referrals into others
- Start with your personal network and build from there
Your network is essentially your net worth, and so it is a long and exciting journey. Do not burn any bridges and always try new ways to meet new people. Assume positive intent.