。
Please don't forget to come pick me up at 6 tomorrow.
Literal
Not-forget-[without-ず] tomorrow 6 o'clock [at-に] pickup-[purpose-に] come-[polite-request-てください]
Note the stacked 迎えに来て — purpose に attached to the stem of 迎える (to meet/pick up), indicating the purpose of the motion verb 来る. 'Come for the purpose of picking (me) up.' This V-stem + に + motion-verb construction is the standard way to express 'come/go to do X'.