I would say the device is not that important and depends more on the particular tasks you need to do for that day. What becomes an issue as with any job where you are your own boss is the time management and efficiency - if you have nobody to tell you what to do you can easily find yourself under or overworking and both are not good for your health and business. So my advice would be put some schedule in place, even if you don't stick to it 100% of the time but have it anyway and allow yourself some flexibility. And the space matters too, you can be at home but have an office space, you just can't be in the right headspace laying on a sofa or in bed, it won't work long term. Work can and should be a pleasure but it does still take discipline and the right attitude and if you are not careful that can all go down the drain very quickly without some order in place. Also some sort of self accounting, again when you don't have to respond to anyone it's easy to forget or think keeping track of the time you spend on different activities is not important. Another huge mistake, it is pretty much all that's important. So do note everything you do, how much time do you spend on it, what are the results, how can you improve it etc. (that applies to any industry really, keeping track of data and one would think it's the most logical thing to do but it is amazing how often it is overlooked). In my first web development company over a decade ago we ran for an year without looking at results at all, we had business coming in so thought all is good then I sat and put together all the data, what time it took to get each project in, how much it took to complete etc and I remember that meeting where we all sat to discuss the results and I asked everyone to guess what the most profitable project was. All suggestions were projets over $10k. Truth was it was a site for $500. It took literally one call and a few mails to close and a day to complete. The big projects were actually over delivered (if that's a word - we did way too much over the top to please and impress people in the end the profit was not matching all the work done). Had we not looked at data we would've continued that way till we run ourselves to the ground. So that is even easier to overlook when you are on your own - how much time do you put in research? Where? Which of your activities is bringing best results is it optimising landing pages, is it sourcing good domains to buy, is it outreach, is it listing your domains on market places? Which market places? etc etc.
