Number your RSVPs! Smartest advice I saw on Pinterest for wedding planning! Number the bottom of the RSVP card and log who has which number on a spreadsheet. Easiest way to track who still owes you an RSVP. When you don't get them back (and there will be many that you won't, its just how it goes) you know exactly who to confirm with. GENIUS!!!
Check how to plan wedding professionally: http://tips-wedding.com/how-to-plan-wedding-checklist/ These Diagrams Are Everything You Need To Plan Your Wedding https://www.etsy.com/listing/216860333/i-cant-stay-calm-im-getting-married-15