Arranging driftwood in a new setup tank requires simple skill and can be summarised as follow:
• Size of driftwood used should be appropriate to the aquarium size, and selection are based on considering overall balance in size;
• Type and texture of driftwood should be uniform to avoid mismatched and unnatural appearance;
• Arrange several pieces of driftwod by laying them over the substrate;
• Secure the pieces by using glass surface and rocks, and by placing rocks to hold them in place;
• Use rocks to secure the pieces in desired angles to prevent the pieces from coming apart easily.

Extracted and summarised from “Mastering the Use of Driftwood in the Nature Aquarium by Takashi Amano” in TFH.