When I write I always spend a bunch of time writing details I believe to be important to the story, but then I’ll go back and it seems so boring to read through. Would you try to make boring exposition more interesting somehow, or would you just cut it out for the sake of a smoother story? Also, I have a bunch of ideas for stories that I want to write, but I can’t really come up with more than that. How do you deal with writers block or coming up with new things to write about?

I wrote a short metawriting essay on the first question a few years back, actually, which you can find here. In the end, it really comes down to your particular style. I myself err on the side of leaving details out, because I trust the reader to be able to fill in the blanks with their own imagination. In particular, I get very tired of reading stories where the first 1000 words are meticulous descriptions of the characters involved, listing everything from height and weight to eye color etc. It just isn’t relevant, but a lot of new authors feel compelled to include this sort of exposition, because they don’t trust the reader enough. The only way to make exposition interesting, is to make the exposition relevant. If it has no actual bearing on the story, then cut it. 

As for developing ideas…it’s a skill you have to learn, I suppose. I personally have a lot of different systems that I use to brainstorm new ideas, and most of them basically involve randomly grouping porn pictures together until they inspire an idea in me that I want to write about. That said, it sounds like you aren’t lacking in ideas, but rather struggling to develop those ideas into full fledged stories. That’s a bit of a tricky question, and not one with an easy, one-size-fits-all answer, but I would offer a few questions you might ask yourself when you run into writer’s block.

1. Is there enough conflict? That is, can is there a way for the characters in the story, both protagonists and antagonists, to act against one another? This sounds like a no-brainer, but more often than not, when I’m struggling to develop an idea, the main problem is that one side of the story lacks any real power or agency in the narrative. The best stories provide opportunities for characters to try and affect the outcome of the story in their own ways–that’s where the best development comes from in my opinion.
2. What do these characters want? This is a question you have to ask–and it’s amazing how often I forget to do this when I’m coming up with ideas. A story can only progress through character action, but those characters won’t act if they have no motivation. You need a ‘why’, before you can ever get to a ‘how’. You have to remember that both protagonists and antagonists need motivation as well. Rethinking about why your characters are involved in this story at all, and what they are trying to get out of it, can help show you the way forward through a plot muddle.
3. Is there something I can do to complicate the story? Sometimes, what a story is missing is a new element which shakes up the conflict and reorients the power of the characters in the story. It could be the introduction of a new MacGuffin, a new character, a new turn of fortune or an inversion of power. If you’ve hit a wall and don’t know where to go next, the introduction of a new element can help push things through. That said, if you add in too much, the entire story begins to bloat–so use this advice with caution. Throwing more shit in won’t make a bad story automatically better, but it might give you a new direction for a decent story to take off and shine.

Lastly, it’s important to remember that not every idea is a good idea. Be willing to discard story ideas that feel boring or overdone, or which don’t excite you, or thing of new ways to liven them up. If an idea feels boring to you, then there’s no reason to think a reader will be anymore excited to read it when it’s done.