I guess I'm odd because I have a "method" for this.
I have a little plastic case that I keep my bobbins and needles in. I clean my machine after 5 bobbins and change my needle after 10 bobbins.
So, I only wind 5 bobbins at a time. Once they are gone I clean the machine, wind up 5 more, put my needles into the slot closest to the new wound bobbins, and begin stitching again. Once those bobbins are gone I clean my machine and remember it is time to change the needle because the needles are in the slot beside my bobbins. After this I then put the needles in the far left slot so I know that I did it.
Sad how anal I am, but too many other things going on in a regular day and it is the only way I can remember to do these things.
Suzanne