Squeeze bottle every morning. Just an ordinary small plastic bottle with a nozzle, not one especially designed for the purpose.
I don't buy those ridiculously expensive salt packets or special "neti salt", either. Not necessary.
A container of pure Kosher salt from the Dollar Tree works fine. 1/2 teaspoon of salt to 8 oz. warm water is pretty close to regular saline.
On those bad days I'll add a little bit more to make a hypertonic solution to really dry them up.
I use a product called Simply Saline which is saline solution in a can which allows for quick, easy and clean use when I need it. It really helps when the sinus infections come around.