Activities I did not like as a child: practising handwriting, learning multiplication tables by heart, waking up early for yoga, helping in household chores, learning to swim, attending music classes.
One of them has really helped me. As a child I hated learning tables by heart, but my mother made me recite them every evening. Today I can do mental calculations very quickly, which saves a lot of time in Mathematics and Science papers and even while shopping. Like Steve Jobs’ calligraphy class, something that seemed useless then turned out to be very useful later – the dots connected looking backwards.