Whenever you are home, use an external monitor, keyboard and mouse, preferably connected via a docking station for easy removal.
when traveling, you can use a mobile , flexible keyboard and a small mouse.
I found this link somewhat helpfull:
http://www.healthycomputing.com/mobile/laptop/page2.htm
and BTW, thank you for asking - you've made me more aware of my own (non-ergonomic) use of my laptop