"Tiny Habits" by BJ Fogg is another one which I find very useful. Just the basic idea of having tiny/baby steps to take is a powerful one.
"Loop Habit Tracker" app is a great app to keep track of your habits especially the ones where you want to record yes/no responses. It's free app available on android (I am still looking for something similar for iPhone for my wife!).
I use LINQPad to manage my collection of snippets to do some ad hoc tasks on my machine. I also use it for testing out new code and learning about new features. It would be great when it becomes cross-platform, but last I heard Jo Albahari mentioned that the investment required was quite big and not worth it (at that time).
On the side note, I had a chance to see Jo Albahari's presentation few years ago in Sydney and I think he is unsung hero of .NET world (along with Ayende)!
Thank you Google, you've made a dent in the universe!
I have also found "Black Lotus App" (http://blacklotusapp.org/) to be a good source for myself. It is free, has some good guided sessions, allows you to attend global sessions and gives access to other resources.
https://www.bluey.tv/watch/season-3/rain/