As you may know, I have a particular interest in political communication. (both as an academic - I'm a member of APSA's Political Communication Section & subscribe to a number of academic and practical journals on the subject; and most of all as someone who has been a candidate at local; national and European levels).
One of my great concerns is that a lot of material is sent to prospective voters - is completely wasted. Recently I participated in handing out leaflets at a shopping centre - the material was very worthy; had lots of useful information - but was too crowded with print to encourage anyone to fully read it. I've also noted the (natural) tendency to substitute lots of leaflets for personal contact - a very dangerous path to go down.
To communicate effectively - that is to win hearts and minds - we need to think about what works. I found the following video a useful one - I hope you do too.