I haven't taken the ACT in over 7 years but I'm going to assume it hasn't changed much.
Math is math, knowing how to do math is the only secret to doing good on this section.
Writing is dumb, I didn't even have to take this section but if you do, they really enjoy when people rewrite the questions and then answer the rewritten question more than actually answering their written question for some reason. (Or so my friends have told me).
Science is basically just reading comprehension with charts, you don't actually have to know any science to be good here, just how to look at graphs and tables.
Reading comprehension is basically a speed test more than an actual comprehension test; Just read the first paragraph, the last paragraph, and the first sentence of every additional paragraph and you should be able to pretty much answer all of the questions or know where to look. Watch out for definition questions because if you're someone who actually knows the dictionary definition of a word; expect to get a lot of those wrong; they want the definition they used; not the real one.
English I don't remember too much, watch out for redundancies in sentences, I guess. For example, if someone asks you to fix a sentence, I remember the solutions to usually be just trimming fluff and not changing much else.
As far as pacing I tend to not worry about that, if you can't immediately answer a question or know how to do it; just skip it until you finish all the others, then go back and try to redo them. Then you can do your idea of taking a minute per question and just guessing if you can't figure it.
Last thing is not to worry too much on the ACT, most people take it like 4 times to get the score they want; sleep is critical too.