The best way used to be XPRA. You can also tunnel it thru SSH, but not necessary in a trusted LAN. XPRA is like a per application display proxy that keeps an app running even if the connection is interrupted and enables reconnects as well as transfers of Xclient windows to other Xservers, i.e. you can transfer the remote window from your notebook to your workstation Xserver whithout having to restart the app.