Every time I go to write an email, I get distracted by my inbox. I check all my new mail, and I put off the actual task I opened Gmail for. None of that new email was urgent, but I couldn't ignore all those bold lines. So now I hide my inbox with Inbox When Ready.
I'd tried other methods, like closing my Gmail tab most of the time. This helped me not idly check my inbox every time a message arrived. But as soon as I needed to complete any email task, I got waylaid by my inbox.
Inbox When Ready lets me search, compose, look at labels, pretty much anything except look at my inbox. I can, of course, open my inbox with one extra click. But until I do, it's just not there and that makes all the difference.
After two days of using the extension, the temptation to click and open my inbox went away. Now I only open it ... when I'm ready. But if your temptation is stronger, you can tweak Inbox When Ready's settings to lock you out of your inbox at certain times of day.
You can tell it how many times you want to check your inbox each day, and if you check more than that, it will add a 15-second delay. You can also set a maximum time to spend in your inbox each day.
You can pay for more attentive support and some extra features, but so far I've found the free version perfectly good. According to its privacy page, Inbox When Ready doesn't read your email or hoover up your contacts, so you're not handing all your data over for marketing.
Now you'll have so much time to check your texts!
Inbox When Ready [Chrome Web Store]