Assuming you can get a lift to Swords, The Swords Express is the fastest way I know to make it to Dublin City Centre, particularly around peak times. Yes even quicker than a taxi !
A quick link to this [and all other businesses who requested] can be found down the right hand side of the blog – under blogroll – makes it handy when you’re in a rush 😉
Tickets cost: €3 off peak, €4 peak and €2 for kids
This is the route into Dublin City and pick up points. It uses the port tunnel and usually has me on the quays of in about 20 minutes maybe 25 minutes – but that’s peak time on a Friday.