Actions you can take to register your disaffection with Brexit

I'd like to call this post 'Actions you can take to stop Brexit' but that would be a bit naive so the weasel-worded version will have to stand for now.

Petitions you might like to sign
Demand a people's vote
https://www.peoples-vote.uk/

If there is no agreement to leave the EU then brexit must be stopped
https://petition.parliament.uk/petitions/219905 - at time of writing 109,189 signatures
 
Stop Brexit - at time of writing 21,448 signatures
https://petition.parliament.uk/petitions/226509

List of open petitions about Brexit (pro and anti) to Parliament
https://petition.parliament.uk/petitions?q=Brexit&state=open

Urge amendment to secure a people's vote - 3,721 signatures
https://www.change.org/p/members-of-parliament-urgent-amendment-to-secure-a-people-s-vote

Brexit.. a second referendum -143,404 signatures
https://www.change.org/p/the-prime-minister-brexit-a-second-referendum?recruiter=574276334

Keep permanent EU citizenship even in event of Brexit
https://eci.ec.europa.eu/002/public/#/initiative
This requires not just UK folk to sign but a minimum number of people from each EU member country. More info from an earlier post from me.

Write to your MP
You can do this via WriteToThem and People's Vote has a pre-filled letter (you need to vary the text) letter to send. I sent something via that link but completely changed the text, a copy of that is here. Also you can do this via Not Buying It.