το γοργόν και χάριν έχει, το εκμεταλλεύομαι όσο μπορώ, το απολαμβάνω τώρα που μπορώ
Prov. If you have an opportunity to do something, do it before the opportunity expires.
Jane: While my husband's out of town, I'm going to watch all the movies he wouldn't take me to see. Jane: Why not? Make hay while the sun shines.to do something while the situation or conditions are right
I've got a few hours to finish the housework before the kids come home so I might as well make hay while the sun shines.http://idioms.thefreedictionary.com/Make+hay+while+the+sun+shines