League of Legends (LoL) Question: How to improve my ganks?

A lot of this would require seeing you gank to point out what you're doing wrong. Some general basic tips to cover small errors are enclosed.

-If you are able to approach the gank-target from the direction of their safety(turret) avoid using your gap closer, ideally you walk to them and hold your gap closer until they use their escape/flash. In shaco's case, however, the stealth advantage is a situational reason to ignore this rule. Learn to judge each case.

-On Shaco, whenever possible, get your auto attack in on the target before putting your shiv on cooldown, you get more slowing power from your ganks

-Try and track laner resources as much as reasonably possible, both allied and enemy, this means summoners, ults, and yes, HP and mana. Knowing the kass doesn't have enough mana to ult makes him a much more tempting target. Ganking for a laner with exhaust and flash and plentiful mana/HP is much better than ganking for an OOM mage with no sums.

There's a lot of finer points, but those are some of the more common large mistakes in silver/low gold.

Source: Jungler main that recently improved past silver/low gold.

The only tip I can think of atm is to look at the mini map and see whos out of postion. If you see anyone overextended then gank them. All my other tips were in the last comment. GJ hidden sanity that was pretty much what i wanted to say but you said it better :3