A few different things:

I have had a fairly solid Anki habit for the past three months or so.

I have ankified a few self-improvement concepts (Lukeprog's posts on procrastination, some of Kaj Sotala's stuff on habits, random other tidbits), and I believe the constant exposure to those ideas has started having an effect, in that I seem to have started doing a lot of the advice in there (not all though). I may report on it later on.

But more dramatically effective, I recently started using HabitRPG, and have used it to get a few new daily habits:

• Always get up before the alarm (previously I'd loaf around in bed for up to half an hour)
• Always go to bed before midnight
• Update my Gratitude Journal every day (I had been doing that semi-regularly for a few weeks before though)
• Do some exercise every morning

It's also a good motivator for just getting things done in general. My choice of habits have been somewhat influenced by KajSotala's article on The Power of Habit, and by talking to some LWers who read that book and talked about Keystone Habits around exercise and sleeping. Also, I was influenced by Lukeprog's talking about success spirals to start by focusing on somewhat easier-to-achieve things (and also, Swimmer's discussion of goals versus systems.