I just keep searching till I find one!!! There's tons of veins! U just have to know how to feel for them. And I always end up hitting a vein, no matter what! The key is to stay hydrated so u don't end up with the problem of not being able to hit a vein. If at first u don't succeed, try try again! And always make sure you have at least 4 veins u can use bc one of them u are bound to register in. So I usually don't have this problem.
Yep. Stay calm, don't poke around in one spot for too long, if you're bleeding all over, stick a tissue(whatever) on it and switch arms, etc, etc, till you hit.
I say don't poke around in one spot too long cause most times when I do that, I end up with blood from vessel in the rig. Which can result in your shot becoming a muddled, bloody mess, that will potentially get clogged.
Always make sure you got a backup rig, so that if it does clog, you can draw it into the other rig. Adding a bit of water, if it clogs. It helps clear up the dope solution(it's harder to see if you've hit if it's all bloody.)
It's been said a million times but, staying hydrated, doing some pushups or arm curls with a dumbbell to get the blood flowing, and flexing before you tie off, can all do wonders.
You don't get your blood flowing, there's no way it's gonna wanna shoot out into that rig, the way we all want it to. You all know what I'm talking about. :D