If you have time and are willing to spend 40 dollars, the loophole has a great section on conditional logic with plenty of practice conditionals and answers.

The only thing that broke me out of the high 160s and into the 170s was aggressive blind review. For every single question I did, I would handwrite (I think this is crucial) why every answer that I thought was wrong was wrong and why every answer that I thought was correct was correct. For RC, I would do the same thing and additionally write where in the passage every answer can be found. I would also reread the passages super slowly and thoroughly during blind review.

Then, I would submit the blind review and look at whatever was wrong and figure it out for myself before looking at the explanation. It was only through doing this that I really learned not just how to do well but how to find exactly what the test wanted, and now I'm consistnely in the 170s.

Everything that finnlyn said is true, but also, the high 160s are really really great. Sometimes LSAT culture online can make you feel like any score less than a 170 means you're stupider than everyone else, but that's not true. After four months of studying you've already hit what a lot of people work for in a year and can't get to. Breaking into the 170s is hard because it's a one or two question difference, and often it comes down to the luck of the draw. Just remember that you've already worked so so so hard and there's no reason to beat yourself up over a score that is super impressive. You have so much to be proud of!