My comment is that syncing is not without issues. The link covers this and has links about how this works and more. I do not have a "do this" answer.
I have a big issue creating problems with my contacts:
I have created differents groups in Address book to send email in different languages and different subjects. I update sometimes directly from desktop in Address book my contacts and sometimes from iPod. Whe when I sync Mac and iPod contacts which were in one group or not there at all but just in All contacs list automatically apprear in one of one of the groups created so those contacts receive email which were not supposed to receive. Same thing with iCal no proper syncing. Thanks for help
Snow Leopard latest update iMac Intel