I think I've got it to work! 
What would be the best way to tighten this code up?
#include <SimpleTimer.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(8,9,10,11,12,13);
SimpleTimer timer;
static char input[50];
char printdata[50];
int timer_prt_Id;
void get_serial_data()
{
 static unsigned int pos = 0;
 Serial.println("Get_serial_data");
 while (Serial.available()>0)
 {
  Serial.println("Data Available!");
  char inByte = Serial.read();
  switch(inByte)
  {
  case '\n':
   input[pos] = 0;
   Serial.println("gotdata");
   timer.disable(timer_prt_Id);
   lcd.clear();
   process_data(input);
   pos=0;
   break;
  case '\r':
   Serial.print("Enter");
   break;
  default:
   if (pos<50-1)
   {
    input[pos++] = inByte;
    Serial.println(inByte);
   }
   break;
  }
 }
}
void process_data(char * processdata)
{
 Serial.println("Processdata");
 if(strcmp(processdata,"clear") == 0)
 {
  lcd.clear();
  timer.disable(timer_prt_Id);
 }
 timer.enable(timer_prt_Id);
 strcpy(printdata,input);
}
void print_data()
{
 unsigned int l = strlen(printdata);
 unsigned int x,y;
 lcd.setCursor(0,0);
 if (l <=16)
 {
  delay(100);
  lcd.print(printdata);
  return;
 }
 for ( x=0; x<l-16;x++)
 {
  for(y=x;y<x+16;y++)
  {
   lcd.print(printdata[y]);
  }
  if ( x == 0) delay(300);
  delay(200);
  lcd.home();
 }
}
void setup()
{
 Serial.begin(9600);
 lcd.begin(16,2);
 timer.setInterval(1000, get_serial_data);
 timer_prt_Id = timer.setInterval(100, print_data);
}
void loop()
{
 timer.run();
}
My ultimate aim is to interface it with my system to notify me of particular events.