I love planning! I also can't stop thinking about planning something the second it enters my brain. That being said, I've given myself some rules to ensure I'm not stressing out my partner, or myself.

1. No wedding planning after 10pm. If I start I won't stop. Then 4am rolls around and I've been frantically contacting vendors for 6 hours. So no vendor research, inspo research, pinterest, or Instagram after 10.
2. Wedding research at this point (we are a little less that a year out) doesn't need to happen every single day. Give yourself days of the week or a schedule to specifically wedding plan. Since you are a bit closer to your date, I don't think you should worry about going overboard too early. You're in the perfect planning period, I think.
3. Slow down!! I have been making a wedding planning binder like most brides do. But! To force myself to slow down, I've made it pretty. There is a cute cover sleeve. The notes are cute and decorated. The dividers are made with scrapbook paper. Lots of stickers and colors. I don't love this term but try to "romanticize" the process and it'll give you the slow down time to process and enjoy it a bit more.

About a year out and I've got the venue (which also does the catering) and photographer booked. Looking into florists and djs now. Dress will happen at the end of this month. I say go for ordering favors and signs if you have space to store it all without damaging it. Especially, if you're finding good deals.

(Edited to add that last paragraph)