A daily visit to https://account.microsoft.com/rewards/ to click on the "daily set" and "more activities" is 100 points.
I got 75 for visiting 3 days in a row.
I think 500 for setting Bing as mobile search - that's obviously just a once off.
Then there are the searches with normal browser, mobile and Edge combine to 222 point (attached pic) - just search something like "Movies 2020", click the first result and the the screen should change to show a horizontal list, a click on each of that list counts as a search, takes no time.
I may be missing a few other little bits and that's before I even turn on the xbox or gamepass app. I will give the xbox daily/weeklies a go as well again it can provide a nice little bump.
Also upon checking, it's only 2300 in 4 days so I slightly overestimated.