Jungle一般

1) Neutral monsters: spawn timers

• ancient golem (blue buff) and elder lizard (red buff) both initially spawn at 1:55, respawn every 5 minutes

• dragon initially spawns at 2:30, respawns every 6 minutes

• baron nashor initially spawns at 15:00, respawns every 7 minutes

(- wolves, twin golems and wraiths all spawn at

1:40 and respawn after 1 minute and 40 seconds)

Always remember to inform your team about the respawn time after killing one of  these objectives (especially dragon/baron).

If you're too lazy to memorize all the spawn timers, Awesomedudei's jungler timer beta 

(http://eu.leagueoflegends.com/board/showthread.php?t=176441)
might be a useful application for you. It's an in-game tool that provides countdowns for all jungle objectives.
↑微妙だった

2) Smite damage

As you might know, summoner smite's damage is based off your champion's level. Knowing how much damage your smite does can be crucial when the opponent jungler is trying to out-smite you. Since smite does true damage to minions and monsters, armor and magic resist are not relevant.

formula:

smite damage = 420 + (current champion level x 25)

people that suk at calculus can write down these numbers on a sheet of paper:

champion level / smite damage

1/445 4/520 7/595 10/670 13/745 16/820

2/470 5/545 8/620 11/695 14/770 17/845

3/495 6/570 9/645 12/720 15/795 18/870