I used to have a 1.2 dynamique, which is pretty much a billabong without the turqoise on the seats.
In terms of mods i'd keep it really simple and clean. I'm guessing you're fairly young meaning insurers are normally warey of you modifying cars so would keep it completely asthetic.
Budget dependant i'd get an RS Grille (They are around £50 from the dealerships and is the best place to get them, PM Wests Renault on here).
I'd also get yourself some clear side repeaters (£Peanuts)
A good set of tyres (they make all the difference in terms of how the car grips and feel)
Set of well suited alloy wheels, although the stock ones are fine really.
Coilovers if you've got the money but again not a neccesity.
Personally i'd work on the first three i've listed and love it for what it is. Put all other funds towards saving for something with a bit more poke