It depends on your needs.

If you need more outputs and signal there is quasi static or rather slowly changing you can use shift registers like CMOS 4094 with parallel outputs. Cascade them by connecting serial output to serial input of the following.
For more inputs you could use CMOS 4014 shift registers.

When signals are changing rather quickly you could use memory mapped 8bit parallel latches like 74HC573. Then, of course, some ports are used to implement address and data bus.

Bye,
Kai