You may try using a timer. Set it at your first task so that if you walk away, it goes off and calls you back to that location.

I use this system when I put something on the stove. I set the timer to go off before things get burned or overcooked. If I walk away, it goes off and calls me back in time to check the stove.

The timer needs to be one that requires you turn it off. If it shuts off by itself after a set amount of buzzing, it may just go off before you were withinh ear shot.

It also may help to have something on that draws your attention. A radio program that you follow or a audio book playing on a speaker.

We need to experiment to find what works.