You may exist at only a single point in the timeline, but very-slightly-different versions of you exist at nearby points (both nearby temporally and nearby via recent quantum branching). Physics determines the relationships between these versions, and also causally ties you into everything else. If you are wearing a hat at this instant, the versions of you a few milliseconds before and after are probably also wearing hats. Your memory is what it is because of what your past versions experienced.
You can think of “doing something” as “being the sort of person whose future self has done the thing” if you like, and you are yourself the sort of person you are based on what your past self was like (again via Physics), but the short answer here is “It all adds up to normality.”
You may exist at only a single point in the timeline, but very-slightly-different versions of you exist at nearby points (both nearby temporally and nearby via recent quantum branching). Physics determines the relationships between these versions, and also causally ties you into everything else. If you are wearing a hat at this instant, the versions of you a few milliseconds before and after are probably also wearing hats. Your memory is what it is because of what your past versions experienced.
You can think of “doing something” as “being the sort of person whose future self has done the thing” if you like, and you are yourself the sort of person you are based on what your past self was like (again via Physics), but the short answer here is “It all adds up to normality.”