The best glass head straight pins are worth the cost. Clover brand pins are excellent. I love the flower head pins the best. Don't buy cheap pins.
The biggest cutting mat you have room for and a rotating mat.
A sharp seam ripper. Not the $1 one. I like Clover and Fons and Porter for general use and most quilt shops have them. Buy two.
Anita Solomon Grossman's book Rotary Cutting Revolution.
June Taylor Shape Cut ruler.