In my copy of the Collins Easy Learning Irish Dictionary there's this -
I did it just now - anois féin a rinne mé é
he's just arrived - tà sé direach tagtha (with a fada on the 'i')
I'm just coming! - Beidh mé leat anois!
and I think you could also use ach with a negative and a vn
or to say just so much is enough - is leor