hi - i would also say use a friend or an app like flora/forest to help keep you accountable.
I'm using flora to make sure i do revision but it's very similar to forest in the sense that in both, you set a timer for how long you want to focus for and in that time you can't go on your phone. during this time, it will 'grow a tree' (i know in flora you can actually put in money in to it, so that you have to focuss otherwise you lose money - this money goes to planting actual trees though) and you can link up with friends and it can give them notifications in their feed about how long you've revised for. it's super satisfying as it shows you graphs as well! I assume forest is similar!
i hope this explanation helps : )