What is the best way to prepare for BCT at age 30?

Had some late 30's - 40's guys in. Your biggest hurdles at least for the guys I knew will be dealing with the kids in BCT (I went in at 25 and had problems with it) and then the constant PT. You will want to acclimate yourself accordingly, get into stretching and working out regularly before you go. Cut down on the sugar and caffeine you won't get any of it there and you'll feel the pain of it if you don't cut back before you ship.

You may be given a slightly different treatment due to age, they know they don't have to treat you the same as a 17-18 year old recruit.

Get a hold of a Blue Book if yu can and start studying basic army knowledge.

I did it at 30, and so can you. Continue to run the same way you are doing. Learn to keep your mouth shut. Have Yoda like patience to deal with 17 year old testosterone outbursts. You will be chosen as a leader, so be one when you are supposed to be. You'll figure it out. See you at graduation Sapper.

If you're good on PT, start studying your required knowledge. It will be one less thing you will need to worry about and it will help those awards you want to earn.

http://www.armystudyguide.com/content/Prep_For_Basic_Training/index.shtml