There are a handful of wedding items that have become basic or expected items, that I agree are necessary and practical. I.e.: the Save the Dates, Invitations, RSVP cards, all for obvious reasons: to get the word out! Brides must remember not everyone has a computer, so you cannot expect everyone to go on your website and click "RSVP" just to save paper/money...
There are inexpensive ways to produce these items yourself, like I did. First: skip the fridge photo magnets. They're pricey, not everyone has a magnetic fridge facing, and even if it is magnetic, many folks are anti-magnets. I'm just sayin'... I get that it's a cute idea, and I'm not putting down those who send them out, this is strictly a DIY post to inspire alternative methods.
Below are bitmap versions of these items I created, either in Microsoft Word or Excel--super simple stuff, friends. They were as easy as fitting into the 4- or 8-card postcard templates, printing, and detaching at the perforated lines stamped on each sheet of paper, with an additional design element thrown in here and there... [refer to previous posts for paper type]
For the Save the Dates, we made them on 4-card postcards, printed front and back, with the photo of us in 'washout' so as to use less ink. One postcard was sent per household, with our return address printed on the reverse side (censored for blog), and a heart where the postcard stamp would go. Bonus! Postcard stamps are significantly cheaper than normal postage. We printed out mailing label-stickers for the recipients on Avery 30-label sheets in Word, which also acted as a general database for storing everyone's addresses for wedding related mailings and future needs.