Terminal Path questions

Is there a way to have paths always set so that I do not have to declare them each time I want to run a language?

For instance, I am using NCL and NCO langauges and the bin files are in diffferent folders


Right now, to access the commands, I have to type this in each terminal window
PATH=$PATH:/opt/local/bin or PATH=$PATH:/usr/local/bin to access the NCO and NCL commands

Is there a way that I can forgo typing the path in each new shell? Just have it globally referenced?

Thanks

 

awesome thanks!