Wedding Checklist is rather easy to do especially when you have everything in place. First thing on anyone's checklist should be the budget, followed by the guest list so you can decide on the venue to be used.
Then the wedding party list, a must is reserving the dates and venues and save those.
After the dates are set, the officiant must be booked, wedding photographer, wedding videographer, music (dj and m/c), florist that can do everything based on your wedding color schemes.
More on the wedding checklist are the transportation, hair and make-up, the restaurant menu, shoes, and last but not least your honeymoon.
I haven't forgotten the rings, those are something special that should be picked by both, the bride and groom, as most things are done just by one or the other.