Things you wish you knew about your role

I saw an enemy Ryze ulting to my location and thought nothing of it... til he teleported an already ulting AP Nunu and blew 3 of us to kingdom come. Made me start thinking about this topic, so I figured I would start it and maybe have a good chat with some folks.

Basically, what are some things about the role you chose to main... that you wish you had a heads up from friends or guides before solidifying yourself to it. Like had you known this from the get go, your experience in that role would have probably been way better than it was before you learned it. I imagine it can be anything, but I am hoping this is a more informative rather than a complaint post. I'll start off with some examples as someone maining jungler:

1. Probably the biggest one for me - Gank at level 2. When you take red or blue, for a brief period you are 1 level ahead and have 1 extra skill the enemy laners do not. I cant tell you how many first bloods and flashes I have taken since doing this.

2. Jungling isn't about killing camps, its putting pressure on the enemy while clearing them. I learned this when I supported before going jungle, you have a lot more time on your hands to look at the map than your team. Plan where you are going, be sure you can succeed, and let your team know if you see something they might not... most of the time you do.

3. It's ok to abandon a lane. I am sure someone is going to get rowdy over this one, but it's true. If you have died to Vayne in bot 8 times... I dont want to be ANYWHERE near that non sense unless she gets caught out. Put your resources toward dragon, herald, or a lane that just needs a tiny bit more help.

TL;DR - Things you wish you knew that make you a better player now, go!