PIN reduction ideas for interface

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dear all.
i have solar tracking system . using below setup working fine  with arduino uno .let me know if way reduce pin usage here
http://www.freetronics.com/pages/16x2-lcd-shield-quickstart-guide#.u0j0palsg4fwhich uses 6 pins
i have motor driver :uses 3 pin 1 pwm, 2 controlling action
wind sensor: analog pin 1
inc sensor: analog pin 1
ds1307 rtc : sda & scl
lcd :a0 & a2

now wanted introduce ethernet shield
http://www.ebay.in/itm/wiznet-w5100-ethernet-shield-for-arduino-uno-mega-/331166266355?pt=lh_defaultdomain_203&hash=item4d1b0c33f3. there way reduce pin usage.

have plan use shield.
   https://www.sparkfun.com/products/11959


quote
with chip kit uno 32

which not arduino. lost.


Arduino Forum > Using Arduino > Project Guidance > PIN reduction ideas for interface


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