Looking for some basic mods?

I just bought my first muscle car. I got a 1969 Plymouth Valiant with the 273 motor. I am using the car as a daily driver at the moment but I am, looking for some basic mods to do to the car.
Thing is that I am looking for some just basic stuff I can do. I would like to get a little more power of out the car. I am just open to ideas. I am kinda at a loss what I can do.


Thanks