It is better to focus on one or a few activities than trying to do so many tasks at once, as you will get better results if you can put all your efforts on smaller groups of activities… Focus focus focus!
Jack of all trades, master of none
Other Proverbs
No hay que empezar la casa por el tejado
A fleeing enemy, silver bridge ( A enemigo que huye puente de plata)
Who grasps at too much loses everything
Appetite comes with eating