This pattern reached its peak in popularity during the 1950's (not that it was that popular). This pattern has been tried and tested. A good place to start for someone new to mixed spoke pattern building.

Maintenance of this wheel is reasonably straight forward and should not require any surgery to replace broken spokes.

The pattern illustrated uses 12 Radial spokes and 24 * 3X spokes (2X could have been used).

View below showing both sides of wheel
There are three spokes to each set. However the crossing spokes cross the spokes in the next set. This happens because I used 3X spokes here. I could have used 2X which would have prevented this.

This means that each set has to be inverted (Inward bound spokes on one set become outward bound on the adjacent sets). While the two crossing spokes leave on the same side of the hub the radial spoke leaves on the other and is interlaced with the crossing spokes.
The valve is a 7 O'clock. In this pattern you just need to make sure the valve is next to a radial spoke. Make the first spoke you start with a radial, and place next to the valve hole.