Mesh/Exporting a mesh from Maya
From Second Life Wiki
Video Tutorial
Chair
Avatar demo
Basic workflow
Create a box (or monkey or teapot or hippo)
Reduce polygons
Apply textures
Scale to meters
Some features of Maya can go a bit wonky when you change the units from centimeters to meters, so as an alternative, leave Maya alone and build as if centimeters were meters, then after exporting, open the .dae file in a text editor. Find this: <unit name="centimeter" meter="0.01"/> and change it to this: <unit name="centimeter" meter="1.0"/>
It is now scaled correctly when you import to SL.
Export to COLLADA
Import to SL
Best practices
Forum thread on Maya best practices