When it comes to the English language, I always subscribe to the principle that “if it sounds right, it is right”. There are loads of grammar ‘rules’ which, quite frankly, were never more than conventions, and which stopped being used in everyday speech years ago. So don’t feel bound by something you recall from a school lesson many years ago. Prepositions are fine to end a sentence with. And conjunctions are fine at the start. Language evolves.
What I’d recommend, from experience, is that if you’re sure something is right, but it sounds wrong, don’t agonise over it. Just write it another way. Sure, it’s correct to say: “the data are available here”, but it makes the reader double-take, and the text loses its flow. If you don’t want to use the incorrect (but more usual) “the data is available here”, then take advantage of the wonderful way many verb constructions are the same in the singular or plural. Try “the data can be found here”.
Similarly, English doesn’t always discriminate between gender in the plural, unlike other languages. “He” becomes “they”, but so does “she”. You might start to write: “today’s engineer will find our product useful in his work”, and then think: “uh-oh, what about women engineers?” So you end up changing it to the horrible “today’s engineer will find our product useful in his or her work”. Not good. Why not just move the sentence into the non-gender-specific plural? “Today’s engineers will find our product useful in their work”. That’s better.
I suspect most people only have such awkwardness problems with writing. They overcome them without thinking when speaking. If you’re really struggling with a piece of writing, consider saying it out loud and transcribing it. Or even try the unbelievably good speech to text software which comes with most smartphones and tablets.