I have a job that makes me to be too busy and whenever I close from work I feel so tired, and I don't even have the energy to login my forum account. The only time I'm free is on weekends and my family is large, if even you want to do something else you may get distracted.
I want to know how you use the forum. Can you engage in forum discussion when you are in the midst of people that your attention can be called at anytime. Or you use the forum when you are free alone, like in the midnight when every where is quiet.
Because I know some forum discussion needs critical thinking and if you are distracted it can decline the quality of your discussion.
If you have something that specifically interest you in the forum, after you close from work you will always find a way to put in 20 to 30 minutes of your time which is enough. For instance, if you are a passionate follower of the W.O thread, I don't think you will be so tired that you wouldn't want to visit that thread and see what is happening in the Bitcoin community. So, it is all about passion which drives everything. I love gambling and daily I visit the gambling board and also the W.O thread to just enjoy the conversation those places. Despite my schedules, I can also create at least 20 minutes daily for the forum unless I'm traveling or going to off-station jobs where I have limited internet access.