How Do i make sure i my profile is signe ...

I have about 4 different ppls profiles on my x box, but every time i turn it on it always has somelse signed in first, regardless of if i was the last person to use it or not, is there i way i kan make sure i am signed in first, all the time, thanks.How Do i make sure i my profile is signe ...
Sign into whatever your main account is, then just hit the xbox guide, go to profile (under settings) and select auto sign-in. Then that account will be the one that always signs in once you turn on the 360;