Hi
From previous experience i find using a letting agent the best option.I msut admit i did want to do it myself but it became hassel waiting on people to come and view.Some turned up and some did not.Depending on where it is i used Lowe in tallaght justin is hos name.They will take a months rent but they will find you a tenant for ayear or so.I have had my tenant for 2 years.he is from poland always has rent in on time.I also have a house rented In Lucan and athy for both i got letting agents.it does save you time and hassel.If you do decide to do it on your own.
verify a ref
get a months deposit
do a check on propery every 3 months give plenty of notice.
with social welfare you are guarnteed your money.
do a list up of every thing you have supplied and take a pic of place before you let it.
good luck