argh, I found English language dreadful but I loved literature (i'm pretty sure I'll be getting an 8 or 9 on results day for both)
across two years I never really revised for language (i did a past paper like once), but I did for literature as it was a lot more in-depth (notes, exam questions, etc). English lit and language use very similar skills (analysis, comparison, etc) so if you practice them for English literature, you'll undoubtedly get better at them for language as you're using the exact same skills.
if you really want to get better at English language specifically, I'd recommend practicing evaluative skills (by doing evaluative exam questions), analysing unseen non-fiction texts (look online or maybe in a revision guide) as it's difficult to come up with fresh ideas in an exam if you've never seen the extract before, unlike in English literature.
What you can also do for language and literature is essay plans instead of writing the entire essay out once you've gotten better at essay writing as it saves you tremendous time. For an essay plan, I would write my introduction to the question, then i'd get come up with 3 to 4 main points for paragraphs and write them down. Around each point, I'd write down a couple of quotes that apply to the point. Because I already know how to form an essay, it just saved me loads of time, as my struggle was with coming up with ideas in an exam and not essay writing (i used to just go blank for a good 5 minutes, struggling to come up with ideas)
to sum up, i'd say focus on literature in able to help you with the analysis and comparison parts of English language. but also make sure to know how to evaluate (evaluation question was always where I lost marks as I wasn't practicing the skill as much) by answering evaluative questions and maybe look on youtube