Welcome to Tatkal Family.
Opens at 10 am sharp on Net as well as in counters. If you are at home booking via IRCTC , even ifwake up at 8 am no probs. But if u intend to go to PRS make sure u go to a less rush counter and make sure u reach there by atleast 6 am to get into a decent position in counter.
IRCTC will be dead slow during the hours from 10 to 12 and IF U R LUCKY u will get a ticket confirmed via IRCTC