Invitations are a great place to start, you could set up a mini production line in your kitchen, one to stick the bows(don't give me that job!), one in charge of the printer, one to write all of the envelopes - choose the one with the best handwriting - you get the picture, the more helpers the quicker this will get done.
How to make wedding invitations
How to make cheap wedding invitations with some glue and your printer is a fairly easy way to save yourself some money in your wedding budget. For the picture on the invitation you have lots to choose from.
When you have all your bits, you need to stick them onto your card, you can buy ready folded blank cards which are great, and normally come with all the envelopes. Definately shop around as you can pay more for the blanks if they are labelled with wedding rather than just a blank card - but there will be no difference.