(1) Your devices - I use a Chromebook, all day everyday (and night!). I also survive just using my phone for meetings. I also tried using a tablet, but it's easier if you have a keyboard for it.
(2) Connectivity - if your work is dependent on using internet it's really better if you have wired connection at home, but 3G/LTE is also useful. I've used it for hangout meetings, just turn off the video.
(3) Your communication/collaboration platform - my work requires me to be in meetings with people from other countries and I always need to share and collaborate resources (i.e. documents, spreadsheets). Of course I use Google! Google Hangouts/Meets for meetings and Google Drive for collaboration. I've also been asked what to use if you want to use an online whiteboard. My suggestion is for you to try the Google Jamboard app and you can share it with others to collaborate on.
(5) Keep nourished - I tend to forget about lunch! My seatmate has been pinging me every lunch time to check if I've eaten. He started to share with me what his lunch was today since he started working from home too. I normally eat leftovers from dinner or whatever Sweetie leaves for me in the fridge. It's better if you plan your dinner the night before so that you can just grab it from the fridge and microwave for lunch. Sweetie also prepared a snack bar for me. The snacks are a collection of odd stuff we pick up from the supermarket and pasalubongs from trips. Most important item I have on it now is... Skyflakes!
Don't forget to take breaks in between! :D