A habit I figured out many years ago but now know is how I work with my #ADHD rather than against it... I frequently put things into "flagged states". I use this to remember to do something else, usually within a few minutes, or at least within the hour.

Simple example: I had a large piece of rubbish in the bathroom. But picking it up right after my shower would just move it to my bedroom. Not good. It needs to go downstairs to the bin. So... I left the bathroom light on. That was my flag. After I finished getting dressed, I saw the bathroom light was on... "oh right - I had to grab that wrapper". It has now successfully made its way to the bin. :-)