That's good advice too.
I am a member of the local tri club, track club, velo club, and masters swim team. Unfortunately, I can't make practices or trainings for any of them. I just pay them. I am also a member at the local YMCA, and that's where I go swim or run or bike for 20 or so minutes once ever few days, unless I get to do it at home.
That's the problem: little time, and it's all odd times.
But this really does help. I need to remember that I know how to train and learn: i did it for swimming and I coached it too. Running is something that I can learn and try and do intervals with and I know how to do that. It's just harder alone: but not impossible alone.