Is it a good idea to retake the ACT?

I took my first ACT this past June and I’m fairly happy with my score. However I feel like I could do better than I did but I don’t really see a reason to complain about my score and people say I should just be happy with it. Here’s the breakdown:

Composite 34
English 32
Math 34
Reading 34
Science 36

Writing 9

I may be able to do better on the writing score and if I prep for English I may get higher, but how much would I have to actually improve by to get a 35 or 36? And is it even worth the effort?

English is pretty easy to improve on because you just have to know all the rules. To get a 36 you need 2 36s and 2 35s or 3 36s and 1 34. A 35 would obviously be easier. So, yes, its possible but its not really necessary.