Great challenges ahead with the things you like to improve on. I had to deal with them as well, and maybe you can use some of what I've learned and done to actually improve on them.
Mobile Equipment
Although I'm not an Apple fan due to their closed environment, I love my MacBook! It is more stable than all the Windows systems I had before.
Smartphone: Also here I have Apple, not by choices, but once having it, the UI is somewhat better than Android. But then again, Android is getting better. The flagship Samsung has a great camera (better than iPhone). If you do not want to pay all the premium, you may like to look into Wileyfox, they have some very affordable phones with pretty ok hardware. If you look to help make the world a better place, look into the Fairphone 2. This is a modular phone where you can replace components yourself, and order also these components. The intention of Fairphone 2 is that when eg a better camera comes on the market, you can upgrade the phone with just the new camera.
Exercises
I tried everything, from sport places, to tennis (must do since it is a teamsport) to running since this seemingly cost the least amount time when starting the run at your doorsteps. Everything stopped quite quickly again. So, I got myself a rowing machine that sits in my house and look at it every day. With ups and downs I regularly sit on it and do my exercise. Still I do it in the afternoon or evening, but I want it to make my habit to start in the morning, immediately after waking up. Apparently that is a good way to start your day + your metabolism is kicked so any food you take will be digested much better. I know for sure, when I start doing this in the morning, and I know I will feel great after the exercises, I will continue with it. Rowing is one of the best exercises you can do BTW, most muscle groups are used. Ok, swimming is even better, but that cost more time since I do not have a swimming pool around the corner.
Online versus Offline
I was always connected to the Internet, like you. Since I've started with Steemit, I even spend way more time online. Need to reduce that as well. I'm seeking less the offline social contact. Need to improve on that as well. So, what do I do here! I make sure I go out of my house everyday (I work at home, so that doesn't really help to keep connected with the offline world). I say YES to almost all invitations I get from friends; Once I say YES, then I do it. A couple of times a week, I make some appointments with my friends as well, once fixed, I show up. No sound is on on my mobile and switched of many of the notifications. I already learned not to jump up and check my mobile when I hear a sound. Took me a couple of years though. I dont have my email client open te whole day, I actually open it a couple times a day; I answer the emails, write those I need to write and close it again. Another tip is to go off grid. I always took my laptop and mobile with my an vacations, and every day I was working, a little bit but still working. So, years ago I went to the South Pole; 12 day trip without mobile network coverage. After returning to Argentina, I travelled for another 3 weeks, but rarely had the urge to switch on my mobile, so I didnt. When things get to much with me 'playing' with my phone while not at home, I think back to that month of vacation and the freedom I felt not having the urge to go online.
I hope I gave you some inspiration to help you master your challenges.
NJOY the place your are offline at the moment! A great way to start not bringing your phone with you outside your room.
Looks like you're quite the Apple user! Personally I think i'd stop using macbooks because I've experienced 2 damaged chargers, and this time around I couldn't tell if it's the laptop or charger since there's no Apple store around here for me to try out..
Wow I didn't know modular phones are a thing now, I thought it's still under R&D!
I guess that's the best eh? I'm so not used to working out in the morning at all, I usually just laze around the bed. I think you're right about kickstarting metabolism early in the day though. Hmm alright, committing to morning workouts!
Kinda difficult if I want to stay on top of curation with Steemit and staying in touch with current events that are relevant to me. Need a smart way to have an effective feed and not spend too much time reading through all kinds of information, although that may cause some potentially important stuff to slip by. But maybe it's time to stop trying to try to know everything on time.. well still not easy, this part.
I really appreciate the comprehensive reply @edje - thank you!
Modular Phone: Google tried to get to a modulair phone, but some year or so ago they abandoned the project. As far as I know, Fairphone is the only supplier who creates these type of modular phones. They also make deals with eg gold mines to prevent child labour and so on. The Chinese factories they us they do not allow the personal to work to many overtime hours. Ie they try to make the world a little bit better. Great goals they have and execute upon, at least that is my honest opinion :)
Online/Steemit: Knowing everything will cause an overload, especially now a lot more authors and posts are working with and entering the system. I recently discovered a curation tool that is under further development and the developer is open for suggestions. That maybe something for you? i like to see posts filtering based on keywords, no idea if this guy want to do it. If you like, check my feed, I just posted on it.
Your Challenges I wish you great success with picking up the challenges; My advise, one at the time since otherwise it'll be extremely difficult to keep on going and it becomes pretty easy to just forget about all of them. I speak from own experiences, many of them :)