As the proud owner of several 510's and the Ego, I've made a discovery I have and thought I'd share it with all my new FRIENDS! 
(And, because I said FRIENDS, all of you that already know this won't make fun of me, right? Thanks guys!
)
I've found that I give the button around a 1 second hit before going to inhale on it and I've just discovered that if I take a primer puff, (very small), with the MANUAL switch, it produces a MUCH better TH!
If any of you HAVEN'T really tried it, I'd say give it a try and see what you think.
Thanks, just wantin' to share!

(And, because I said FRIENDS, all of you that already know this won't make fun of me, right? Thanks guys!
I've found that I give the button around a 1 second hit before going to inhale on it and I've just discovered that if I take a primer puff, (very small), with the MANUAL switch, it produces a MUCH better TH!

If any of you HAVEN'T really tried it, I'd say give it a try and see what you think.
Thanks, just wantin' to share!