I discovered a trick to count time in my head. To see how accurate it was I timed myself with a digital stopwatch while counting to a minute (obviously without looking at it).

My time was 1:00.06.

I was like "dayum!", so I tried it 4 more times... here were the results:

1:00.06 s
0:59.97 s
0:59.54 s
0:59.72 s
0:59.75 s

Average time = 59.81 s
Average precision = 99.68%

Well, it's easy when I think of a song whose BPM is 60 or 120… That's basically the easiest way to keep time…

Here, try, no cheating!

http://www.online-stopwatch.com/

This
Music timing

1:00:4.
That's not bad with it just in my head…