I heavily use android's focus mode to keep myself from being too distracted. Originally I tried using app timers, but I found myself just constantly bumping them to the point where I wasn't getting a benefit. Whenever I notice an app being noisy with notifications (even if I appreciate them when I'm not busy), I add it into the list of distracting apps. I have a daily focus timer that enabled when I get to work and ends when I (generally) leave work. This keeps me focused during the day, but I also occasionally enable this when I want to focus on other things, or if I find myself spending too much time on random apps. Because of the way that the breaks work, I have to keep asking for 5/15/30min and I'm very aware of how much time I'm wasting. I also enable flip-to-shh mode, which disables all notifications when my phone is face down on a surface. I realize that focus mode and flip-to-shh can seem extreme, but I noticed this works well worked for me.
I love Rotring pens and pencils - I used a Rapid Pro mechanical pencil throughout college. Nowadays I use a Rotring 600 or 800 with Ohto ballpoint refills. The knurled grip is great, the the overall weight of the pencil is much better than your average plastic pen.