I always loose my malas. I only ever accept these as gifts, so I can never replace them when I lose them. I think these are very useful devices, and so one of the techniques I’ve used in place of a mala is by counting on my fingers.
I count the segments of the fingers instead of the actual fingers. (I know these are often called phalanges, like the bones, but I prefer segments.) With three segments to a finger (sorry, I don’t count the thumb), there are twelve to a hand, and so you can count up to 12 on one hand or 24 on both hands. This is especially useful for counting seconds of minutes.*