I think it would be a great idea to add a button by answers labeled "I will try this" that you can click to get reminders about voting on the answer.
When I have a problem, I often find possible solutions on Stack Overflow. But in many cases it's not so simple that you can instantly tell that you found the right answer.
You might need to do a bit of hacking, reconfiguring, testing, etc., before you now if you found the right answer or not.
Then life happens a bit and you forget to go back and upvote the answer that actually helped you (or add a new answer to the question).
So, my idea is to have a "I will try this"-button by the answers. When you are browsing answers and find something you want to try, you click it.
If you did not upvote that answer or add an own answer to that question within a day (?) you will get an email reminder to go back and vote.