Make your point in your letter. Specifically request a written response to your letter so your representative will have to explain his or her position in writing. Always identify yourself. Anonymous phone calls will be ignored. Be sure to mention that you're from the state or district of the politician you're calling.
Constituents always receive attention.
State exactly what you want your Representative or Senator to do. Don't be vague. Request a specific action on legislation. Personal insults, threats, or yelling will be discounted. Nothing is gained by being argumentative.