Credit Card Lounge

I want to get a frequent flyer credit card but I already have 3 credit cards with generous limits. I don’t need these credit cards and I would like to cancel them and have this “possible credit” to go towards the new card. I heard once that canceling a credit card has a negitive effect on your credit score. Is this true? If so, how do I switch credit cards and avoid affecting my credit score in a bad way?

I preferably need a studen credit card (to build up my credit-seeing as how I do not have any line of credit). I just need to know which credit cards/student credit cards instantly approve/deny you or at least you find out some sort of answer within a few hours.

I am trying to rebuild my credit after ID theft, a couple of problems that were mine and years of basically not having any credit reported. (I primarily use my debit card and pay cash for everything). I make good money now and am trying to rebuild in order to purchase a condo in the next couple of years. My good accounts (rental, club, cable, cell, etc.) have not reported my good credit. So how many cards should I take out that will help boost my credit score but not hinder my credit. Thank you!

I had just turned 18 a few months, ago but when i chose to sign up for a credit card tonight at 2 locations..
www.newegg.com and
www.officemax.com
i was declined with this message “LIMITED SATISFACTORY CREDIT HISTORY”

I’m trying to understand what exactly that means, i have 2 bank accounts all good, no problems, and no credit cards.. How can i establish good credit if i cannot even get a credit card?

Or do you know of any sites or stores that have a near 100% approval