Big giveaway to capture emails

[whitedaisyuk]

Hi, we recently hit a great milestone and I want to do a big giveaway. I want to capture emails for anyone who enters. Has anyone used a good tool before to do this? Or is it as simple as setting up a landing page to enter and then adding email addresses into a giveaway generator? I'd also like them to comment 'done' on the post for further engagement. I'm thinking to run this for 2 weeks - has anyone any tips or comments to help? Thank you!