There are a lot of threads around now from varying perspectives about 'minimum hp' since the player hp/sp UI became visible, and with the increasing use of myddo.
I'm not offering any thoughts on that, but generally speaking it's hard to argue with the notion that more HP = good.
So whether you're worried about your hit point score, an enthusiast looking to add more or if you're a seasoned player ready to offer advice, then this thread is the place to do it. Rather than re-invent the wheel I've compiled a few useful links. The idea here is to fire back any questions about items/enhancements/feats/builds etc and hopefully you'll get an answer.
Link 1 A general gear discussion with relation to HP, and importantly it lists a few quick wins.
Link 2 More of the same but with reference to rogues and gets more technical.
Link 3 The DDO wiki on HP. Simple and effective.
Read, digest, use. Post questions/concerns.