Focus point for Landscapes

When shooting Landscapes with a wide angle lens and you can get a lot of foreground (~5 ft.) and background trees in the far distance where is the best focus point? I usuall set the lens to f/22 and focus on the foreground. Is this a common setting with pro shooters?

Try to set the lens to focus at the hyperfocal distance, which can be calculated here
http://www.dofmaster.c​om/dofjs.html
It gives the greatest depth of field for any lens from infinity to half the hyperfocal distance.

A pretty good average rule of thumb for hyperfocal distance is that 1/3rd of the focal plane is ahead of the thing you're focusing on and 2/3rds of the focal plane falls behind what you're focusing on.

The EOS 3 has a DEP setting which allows you to set two focus points, one for furthest and one for closed in-focus point, and the camera does the calculation for you and set the focus accordingly.

I miss this now I've got my 20D. Use the 1/3 2/3 rule now.