i used to do this from raheny. i had to be ni work for 8am. in the morning i got a lift at 6.45am and was in for 7.20am. sometimes i had to use public transport. got the dart at 6.40am to tara then walk to stephens green, luas in 20mins usually got in for about 7.30am-7.40am. in the evening time left work at about 5pm then got back to house at around 6.15pm-6.30pm. the real problem on getting home in the evenings was the dart. if once was cancelled or full or the timings just didnt work our right (as in wating more than 15minis for one) this was a particular pain the behind. aldo getting close to christmas wasnt fun getting home either spaces at a premium on the dart.
hope this helps
burger