Details of this years New Years Eve celebrations have been released
As with every other year if you want to go to a particular restaurant make your reservations early.
Some pubs and clubs charge entrance fees, others do not, it's becoming less and less prevalent a custom, be sure to check out where you intend going with the pub or club themselves to avoid disappointment.
Be aware that the majority of pubs and clubs in the city centre will be fairly busy and crowded, time to get intimate with other revelers! Everyone has their own opinion but from personal experiences I find there is very little difference between one pub or another on NYE.
If you can pre-arrange transport home it may decrease your waiting time for a taxi/bus in the wee hours. If at all possible choose a hotel in the city centre so that you can walk home, it's not essential but it may make life easier for you!
If you like a wild drunken raucous affairs then Temple Bar is the place for you, if you prefer something quieter it's probably a place to avoid the area.