I know you're going to think this is nuts, but I have the following list of cooking conversions secretly taped on the inside of one of my cupboard doors. Hey, I'm not proud, what can I say :)
3 tsp ----------1tbsp
4tsps -----------1/4 cup
5 1/3 tbsp ----1/3 cup
8tsps -----------1/2 cup
10 2/3 tbsp ---2/3 cup
12 tbsp --------3/4 cup
16 tbsp --------1 cup
2 cups ---------- 1 pt
4 cups ---------- 1qt
4 quarts -------- 1 gal
8 quarts -------- 1 peck
4 pecks -------- 1 bushel
16 oz ------------ 1 lb
32 oz ----------- 1 qt
8 oz ------------- 1 cup
1 oz liquid ----- 2 tbsp
1 pound --butter or shortening equals 2 cups
1 pound --all purpose flour equals 4 cups
1 lb brown sugar --equals 2 1/2 cups
1 lb granulated sugar --equals 2 cups
1 lb powered sugar -- equals 3 1/2 cups