Vudak I have used just about everything from holding the joystick between my knees, to modifying a desk.

This pic is when I first started on the desk. There were many changes before I gave up on it. FYI I gave up on it because the office chair moves around while using the rudder pedals. So I decided that I needed something with the seat in a fixed position.
Looked into building an Akers-Barnes simpit. Even got the plans and the permission to build it.

Akers-Barnes holds the rights to the design.
I have also seen some great ideas on how to make the simming experience more comfortable on these forums.
Look here
http://bbs.hitechcreations.com/smf/index.php/topic,232659.0.htmlOne guy mounted the stick and throttle to the bottom of his chair using pieces of wood. I thought that was real ingenious. Unfortunately I can’t recall who it was.
I finally decided to just build my own custom simpit.

Still a long way to go but I'm getting there. When I'm done the cabling will run inside the tubing, the speakers will be mounted to the simpit, and the keyboard will be on a swing arm mount.
What I’m getting at is you can make something that will make flying more comfortable for you. And being comfortable is what it’s all about. How far you want to take it is up to you.
If you have any questions feel free to ask. I'll help you if I can.