If you are planning on opening a DWG file with SW to bring some of it into a SW part, then you can probably save some time with this tip. While still in ACAD, move whatever it is that you are going to want by selecting it and positioning your desired point at 0,0. Then select it, Ctrl-C to copy it to the clipboard, open a sketch in a SW file, and paste in the stuff on the clipboard. Since you moved it in ACAD, it will drop into the SW sketch with your selected point at the origin, rather than out in space somewhere. Most of the time this will probably be faster than moving it later in SW.
WT