G.♣.
When I was looking at preschools and at daycare centers, I had to go with my gut. I remember asking people what sorts of questions I needed to ask and what I should be looking at. After touring a few places, I realized that the owner/director always answered my questions without me even asking. I suppose since they are used to giving tours, they already know the top 10 or 15 questions on each parents mind.
So after seeing a few places, I had to go home and just reflect. I don't know that I could necessarily pinpoint exactly why I felt better about one place or another, but there was that one place that stood out and/or gave me that feeling that this was the right place for my child.
When my oldest went to preschool, I chose a play-based preschool. I met the teachers, and watched how they interacted with the kids. They were very friendly and really knew how to speak to their level.
When I was looking for daycares for my youngest, it was down to 2 daycares Both were very friendly and had bright, inviting rooms. The one we chose was in our school district and had an afterschool program, so our older son could ride the bus there after school.
Your needs might be very different than mine. I hope you get some helpful tips, but in the end, you have to go with your gut.