Things I noticed so far from S3 to S1/2

The way Sarah Palmer moves down the steps the night Maddy dies is the same as the way the flying frog moves across the desert.

the bonsai tree on the side table in the NYC glass box room, like the one from Windom Earle at the Sheriff Station may anchor those timelines together

the electricity flickering when Laura Palmers body is being identified and the letter is taken from the fingernail reminds me of The Arm and the theme of electricity in S3