1- Sell. Sell Sell. Because you are in panic mode and just have to do something. Many lost in past doing that.
2- Be patient. Hang in there. And this too will pass. LNCO price will recover. All will be over. Just wait it out. Then you will not have to take the loss. The price has recovered substantially in past and will again.
Choice 3- Buy more. The Berry merger is looking modestly more positive recently. If it goes through, it will meaningfully brighten LINE/LINCO's future. That, and the recent Permian basin purchase, will likely solidify the dividend at the current level for the foreseeable future (at least). I'm not that concerned with price appreciation (although we are likely to see that as well) if I can invest money with a long-term 10%+ dividend return on it.