If you're from a non-EU country you may be entitled to a partial refund of VAT, Value added tax (23%) paid on items purchased here so ask the retailer at the point of purchase.
Many Dublin attractions that charge an entry fee will often have a discount for booking online so it's worth checking out before turning up to attractions.
The Georgian area of Dublin is a great area to stroll and take photos in as there is an abundance of characteristic Georgian houses with brightly coloured front doors and ornate fixtures. Also, a walk down by the canal is a most pleasurable exercise to see more of the city.
Smoking inside is not allowed in Ireland, having being the first country in the world to introduce a smoking ban in workplaces, including pubs. This means that pubs found space to convert to, technically outdoor yet sheltered and comfortable, designated smoking areas and very often the best 'craic' is to be had in smoking areas, with even non-smokers tending to occupy them.