First thing to remember is the first roll always turns out bad. For every batch. No matter how experienced you are at rolling!

I use for the filling (everything chopped up very finely):
Cooked chicken
Lettuce
Grated carrot
Cucumber
Chilli
Coriander
Mint
& obviously rice paper and cooked rice vermicilli noodles

And for dipping sauce:
Soy sauce
Sweet chilli sauce
Fish sauce
Lime juice
Sprinkle of palm sugar
Diced chilli (I love chilli.. haha)

Otherwise, if you just get the spring roll dipping sauce in the Asian aisle it's not as good but quick and easy.

My big tip is you must have a damp (obviously clean!) tea towel to roll on. So soak rice paper in warm water, then place on damp towel. Oil your fingers slighltly when rolling with sesame oil so you don't stick to the paper.

Also, there's always recipes with a diagram for rolling on the back of rice paper packets.

Good luck & happy eating