What are the best (current and potential future) ways to get btc on and off of the lightning network?

Feel free to answer any parts to the question that you feel comfortable answering.

1. What are the best ways to get btc onto the lightning network? 1a) currently 1b) potential ways of doing in future

2. What are the best ways to get btc off of the lightning network? 2a) currently 2b) potential ways of doing in future

Thanks!