I'm not going to go over how to jungle with meta junglers just yet, but all you really need to know is razors for champs that mainly use basic attacks, spiritstone for ones that rely on spells (and nasus...don't want to mess up your last hitting with siphon). Take your buffs (don't want other jungler doing that for you, and junglers are usually faced with level problems), kill them with smite (you never know who's watching, you might want to block potential skillshots), give your mid blue if they use mana (or need cdr like kat), and gank lanes often, warding for them as well (lee sin sightstone op), good ways to counter wards is to go all the around through their tower, or rush through the ward with an initiate...vision wards work too.

Start hunter's machete no pots, get a good leash on blue (or red) (sometimes you don't even need a leash, doesn't matter how much hp you're left with as long as you don't die), you can only afford to lose one small monster. After that, you recall and have just enough money for razors. And that's pretty much the whole trick, razors+attack speed runes/masteries=ability to jungle with anyone. This works so well because the least meta junglers are the supports, but since their main output is basic attacks, you won't even want spiritstone even if it gives you as big of an advantage early game as razors. An example would be lulu, I like going dps with her anyways because of her passive, same with janna (more blows with your flat shield). Really, the only support this doesn't work well for is soraka, while she can sustain with spiritstone (her main output is spells/q) and armor heal, she takes forever to clear camps and may result in underlevel and getting killed during ganks, and because she has no cc, she can't save allies running through jungle, or provide good ganks for that matter. Yes, even with red, her slow missile speed messes everything up (that's why when I mid-raka, I point blank attack, or else I won't be able to judge the banana timing and not be able to last hit). This razor trick works with the melee, tanky supports, such as blitz, taric, leona. Since their output is once again from basic attacks, (double tap op) and the rest of their spells are defense/cc, not damage). You might want tabi or berserker's as your boots, depending on how much ad the enemy team has (if they have lots of cc, get zephyr, not merc). You might want homeguard as your enchancement if you're a squishy support, since you take brutal hits in the jungle, have to give blue to mid (you don't use that much anyways, and once again, basic es numero uno), you recall with low mana and health, the insta refresh and speed buff and really save time and prevent underlevel.

Of course, you get 4 points on attack speed, and since you attack so often, you might as well go ad, grab the ad masteries as well, notice I ignore the 8% armor pen, since you have no ad spells, but feel free to get it, since it's a waste to the 4 prerequisites and not get the upgrade.

Obviously, you should get attack speed runes for this. If you do the math, attack speed marks and quints are the most worth it (just like how flat armor seals and scaling mr glyphs are)