I go in a circle. Left delt, right delt right quad, left quad. Counter clockwise... it's the only way to go. Daily injections. 25g 1inch. Was just doing delts a while back with 29g slin pin daily but the slin pin only holds 1ml so I switched to 25g so I could pin more. But I gotta say, when you can't even tell you pinned after using the slin pin it's very nice.