I always hit this point in development when...

[AGP]

Yes, taking a break is a great idea. Step back, gather some ideas, and look for places to improve.

Currently, I'm working on a fairly large map, so what I'm doing is kind of jumping around from room to room, just putting in what I know for sure is essential (a fireplace, bookcase, table, etc.), then I focus on one room.

If I start to get bored with that room or feel like I've run out of ideas for it, I simply move on to the next room and so far that process has been working out really well for me.