I'll answer with something cryptic, which the rest of this lesson will further explain: you're making a bad assumption. You're assuming that you will actually get everything you answer correct, which is, for 99.99% of the people, false.
The way you want to approach your LSAT is to embrace a principle borrowed from Economics: the low hanging coconut.
Imagine you're on a desert island and you're thirsty. The only source of potables is coconut water. But, coconuts grow on the top of some really tall trees. How do you get them?
Let's pretend there are exactly 25 equally sized coconuts. You need to get at least 20 of them within 35 minutes to not die of thirst (yeah, they're, um, really small coconuts), but it'd be great to get all 25. Sound a little familiar? Haven't we all been trapped alone on a deserted island dying from thirst with coconuts as our last salvation? At least emotionally? Figuratively? Just me?
Anyway, let's walk a little closer to the tree. Or, actually, just you. I'm only there with you as an apparition, narrating this because you're hallucinating from thirst.
The first thing you notice is that the tree is really tall. There are lots of coconuts at the top, but hey! Look! Around the trunk, there are 12 of them just lying there, like idiots. Oh stupid coconuts, what joy you bring! Scoop them up quick before you start to think that we're actually talking about coconuts instead of questions on an LSAT section.
That took no time at all! What will we do next? Let's have you shake the tree to see if any will fall down, eh? I mean why wouldn't you. So, you shake and shake and lo and behold, 7 more delectable coconuts drop down from the tree. Great, we're at 19 coconuts! And we still have 10 minutes left. Now what?
There are 6 coconuts left in the tree and you still have 10 minutes to get as many as you can. There is only one thing left to do: climb. This is time consuming and the results are uncertain because you probably suck at climbing trees. And coconut trees... are an absolute nightmare. Instead of branches for you hold onto, they have perfectly smooth bark. But, lucky for you, some of the coconuts hang lower than the others! So, you climb a couple of feet, and grab the lowest hanging ones first. Then, you climb a bit higher to get the harder to reach ones near the top. The 10 minutes evaporate like drops of coconut water on hot sand and you manage to score 4 more coconuts for a total of 23/25. Not bad.
These are macadamia nuts, which are delicious nuts. A coconut is also delicious, but is not a nut.
Now, to bring the analogy home, imagine each of those 25 coconuts had a number on them, 1-25, like the LSAT questions are numbered 1-25. The ground-lying-coconuts, those 12 easy to get coconuts, are numbered 1, 2, 3, 4, 6, 8, 12, 13, 14, 21, 22 and 25. Those 7 medium difficulty, shake-me-loose-coconuts, are numbered 5, 7, 10, 11, 17, 19 and 24. Those 6 difficult-to-get-way-up-on-the-top-of-the-stupid-tree coconuts are numbered 9, 15, 16, 18, 20, 23. The way you approach your LSAT sections ought to mirror the way you approach your coconut collecting. Get the easiest ones first! Save the harder ones for later. This way, you ensure that each incremental minute of time you spend on answering a question is spent on the lowest hanging question, the easiest coconut. This must become a habit.
On V-Day, you'll certainly be hit in the face with a couple of ridiculously hard coco... I mean questions. The worst thing for you to do is to be stubborn. You just knocked out questions #7 and #8, easy. Now you see coconut #9 hanging on top of the tree and you spend 30 seconds reading it to realize that you have no clue how to get it down easily, except to climb. Don't climb. Move on. To spend the next 3 minutes climbing up to the top of that tree to collect coconut #9 while coconut #13 is just lying there on the sand is foolish. It's not worth it. It'll cost you too much, even if you get #9 right.
In addition to overpaying for that question in terms of time, you will also be overpaying in terms of psychological strength. You may freak out once you realize what a bad decision you just made. "Arg! That was 3.5 minutes on 1 question and I still have 16 questions left." I'm also assuming the best case scenario where you actually get #9 right - a big assumption, since you tend to miss hard questions. But even if you get it right, you still lose. You shouldn't have gone for it until after you finished up gathering the easy to get coconuts first. Every question is worth 1 point anyway! Why would you risk not having time to do an easy question in order to attempt a difficult question?
When you're taking your timed practice LSATs, learn to intentionally skip questions that you suspect may be "out of your league." Cut your losses and move on. Don't try to fix one mistake with an even larger mistake.