oh right. no, i've been pretty lucky with injuries. i don't know how though, the first few years i never took any care with what i was doing. Well, i hope your back is better. there's nothing worse than not being able to train for a few weeks, whatever the reason. i always feel like i'm wasting away
i've never had a serious pulled muscle injury. i would usually recommend resting. take the weights easy at the least and maybe stick with exercises that don't force you into positions where your back is load bearing. Stuff like deadlifts and barbell rows will play hell with your back if its injured. don't arch your back when pressing either, that can be very damaging.
you may want to remove weight altogether and exercise with just bars so that you can perfect technique. maybe take a week where you just use the bar and after watching, on youtube for example, the correct/most safe technique for the exercises you do, then you can start to add weight, while your back heals.