Thinking about quiting this job and moving to another job ?

Hey I've been working for dunkins for about a week. Now the reason I say I want to quit this job is bc I've found numerous oppertunities for retail (footlocker, and radioshack) i've spoken to the manager of Footlocker already and he said he'll call tmorrow to schedule an interview during the week and with radioshack a few ppl left and they are looking for 2 FT positions and one pt positions. How should I go about doing this ? HELP HELP HELP!!!!