1. Don't buy champions randomly!
LoL has two currencies: Riot Points (RP), which are bought with real money, and Influence Points (IP) which are earned solely by playing games. Champions can be bought with both, but every week there will be ten free champions to play with. Play these
champs instead. Get a feel for each type of champion and see which you find more fun. It's far better to do this as opposed to buying a champ randomly and ultimately being unhappy with it. Also, (it's rumored) you can get ONE refund opportunity for (I believe I read) up to 3 RP purchases. After that, it's your own fault for spending RP.
2. Don't buy Tier 2 Runes.
They are pretty much a waste of IP. Buy Tier 1 and save up for Tier 3. Or, if you're baller like Hargaad, don't even buy Tier 1. Wait to hit level 30, then buy all the Tier 3 runes you need.
3. Do queue with friends.
Playing with randoms is a crapshoot, and playing with an armordillo or two can put the odds in your favor. Play complementary champs and request feedback on how you did in each game (even if you won). Likewise, you can offer advice to others you saw having trouble in a polite manner (because if you aren't polite, you're likely to get flamed).
4. Do learn the champions
When a new rotation occurs, it is wise to play a few games with each champ. Knowing what each champ is capable of will be useful even if you hate how they play and never intend on using them. For example, Karthus has a skill that does damage to every enemy champion, regardless of location! If you know this, then you can be a jerk and take Soraka.
5. Do read guides.
There are multiple ways to play a champion. This combination of skills, runes, masteries and items is called a "build" and are the general strategies for any champion. The recommended items in the game store are not always accurate, and the order you level skills can have a big impact on how the early stages of the game play out. Sites like Mobafire
offer builds for just about every champion. It's cookie-cutter, but a great foundation for new people. Once you learn the ins and outs, you can tweak a build to better serve your playstyles or as a reaction to enemy or ally players.
6. Do be polite and do report
Sometimes people will suck or do shit wrong. It's a game, so try to keep that in mind when things get a little unhinged. If you insult or yell at people, even if they DID do something wrong, you're likely going to get that person defensive and things break down. Instead of focusing on the game, you focus on hurling insults at each. Stay calm, and politely offer advice when needed. And yet, people are jerks. It happens. Simply /mute them and quietly report them after the game. Taking their bait is probably what they want you to do. Do not give them the satisfaction! Keep your cool.
7. Buy skins
Having a skin for a character is a great way to say "Hey I'm fucking awesome with this champion so get the fuck out of my way." If your team is using more skins than your enemy team, you basically have already won. If you're playing as , you've won the awesome award.
8. Check out The League, premiering its 4th season on October 11th on FX!