I have so many Besides 6 or 7 store credit cards (opened them for the initial discount), I have 3 major credit card, citi for grocery and drugstore, discover for gas, chase business for restaurants and office supplies...

It is good if you could resisit all these temptation to stay with one card. I cannot.

Open one store credit card will reduce 20 points from credit score. I will try not to open more in the future

6 or 7 store credit cards seems too much, intial discounts normally are only $10-30.