COMMUNITIES
Do not work alone. Become part of a community. If you want to limit yourself strictly to forensics, this is easier said then done. Organizations dedicated to forensics with a vibrant network of local chapters are rare. Personally, I do not see this as a bad thing. I think it is far better to get plugged in to the broader information security community. If you think about it, having friends that are experts on things like offensive security could be helpful to you in the future. You will also find many domain experts on Linux, Assembly, etc. in this community.
A good starting place might be a local DEFCON group. The list of groups (named according to phone area codes) can be found at https://www.defcon.org/html/defcongroups/dc-groups-index.html. If you live in a large city, you might find that there is a DEFCON group in your area. What if you don’t live in a big city? E-mail the contact people from some nearby groups and ask if they know of anything going on in your area, especially anything related to forensics.
Local meetings are great. You can meet like-minded people, and often such meetings can be fun. The problem with these meetings is that they tend to be infrequent. Even monthly meetings are not enough interaction with the bigger community. This is where online communities can be extremely beneficial. When you join an online community, you have access to many experts around the world, not just people who live nearby.
A great online community to become a part of is the one at Pentester Academy (http://pentesteracademy.com). Pentester Academy goes beyond a couple of discussion forums by providing downloads related to this book and others published by their publication branch, author interaction, and a growing library of courses. Another plus of Pentester Academy is that it is not narrowly focused on the subfield of forensics.
If you are only looking for a place to have forensics discussions, you might consider giving Computer Forensics World (http://computerforensicsworld.com) a try. They offer a number of discussion forums. There is also a computer forensics community on Reddit (http://reddit.com/r/computerforensics).