Tali G.
Google
If you're a citizen, you won't wait long to get in, but once you're there make sure you have a good book because it could take a while. Don't forget that your not allowed to bring in food, drink, electronics or even pills...
You can bring in a small bag (clutch size) with your wallet and keys and any relevant documents.
If you have a car, leave your stuff there. If not, there are a million coffee shops all around that will rent you a cubbyhole for about 15 shekel where you can leave your phone and other prohibited objects while you're inside.
If you bring an empty water bottle the is a water cooler inside which you can fill it up with.
If you have kids, rest assured that they actually have some really nice toys in play area of the waiting room which helps tremendously in passing the time. If you have really small children, sometimes the guards will let you sneak in a snack for them, but don't take it as a given and bring everyone on full stomachs!
The staff are incredibly kind and helpful too