Send emailed transcripts from Google Voice to Wunderlist as a "To Do" task.
If you use Google Voice you can have the voicemail transcripts both emailed and texted to you. The emailed transcripts are sent from firstname.lastname@example.org. Make sure you configure Voice to send the transcripts to the same gmail account you signed up with to Wunderlist. Then, set up a filter in the gmail settings to auto label these transcripts (ex., "Google Voice"). Once labeled the transcript will be sent to your Wunderlist inbox at email@example.com as a task to do (it takes a minute or two for the push to happen). The body of the transcript will appear in the sidebar. Return the call and check the box as done!