Let your solicitor do the worrying. You should pick up the keys from your solicitor after the closing (never have to meet the other side or their solicitor). Worth calling the estate agent to check if they still hold any keys in which case arrange to pick those up once the estate agent has been informed of closing.
Be sure to read the meters yourself as soon as you go in and it's worth ringing the ESB and Gas to check they have those readings and your details on their system.
In the unlikely event the phone hasn't been cut off, call Eircom immediately.
With cable tv, just notify the supplier if it hasn't been cut off.