Beginner PCB design for LED clock

Hi everyone,

I’m designing an LED clock using an Arduino, 74HC595s for the control, and ULN2803s for grounding the LEDs.

I’ve got everything working on a breadboard, designed on a schematic and a first version laid out on a pcb in Eagle.

The main question I have is related to decoupling capacitors and a ground plane. I was having trouble finding out online if the capacitors should have their own pathway to the 74HC595s, or if they could both simply be connected to the ground plane.

I haven’t put the ground plane in in this version, and any suggestions overall are much appreciated.

Thanks for any help.