RE: Back again for more advice; Consistency, Playstyles, and Winning
-1: Game Plan for Deck Building
Before you build a deck, take a look at the format as a whole, and then pick either a deck that is good in our format, or is a counter to most of them. If there are many Keldeo decks in your area, a deck that ises multiple Mewtwo/Sigylph would be good, or Terrakion/Landorus if you see lots of Hydreigon or Eels decks, ect. Or Build whatever deck you think works best, using a good meta deck is never a bad thing.
1: Deck Building
When I have a problem building a deck, this is a guide I follow, it helps when I need a new deck, or have a problem with an old one.
The first thing I do when I build a deck is set aside room for:
2 Random Reciever
Of course, you edit this line before you complete the deck, but it's nice to know you already have most of them in the deck already.
Next I set aside room for 10 energy cards, this also can be edited, but most decks need 10-12 anyway (including specials).
Then I put in the pokemon, usually 3 of my main attacker, 3 back up attackers, and 4-7 supporting pokemon (depending on if you use a stage 2 or not).
Next add in necessary Items, this includes Computer Search, Dark Patch, Max Potion, ect.
Now you should have about 42 cards, the rest is used for other pokemon, extra energy, other trainers, ect.
This is a good guide line for cnsistant decks, as long as you have enough supporting Items and pokemon to keep your deck running the way it should.
-2: Before the match
Before you play a match, take a deep breath, and put this thought into your mind: It's just another game of cards. This works for me all the time. And you could also avoid eating much sugar or caffine before a tournament, this can heighten any nervousness or anxiety you already have.
2: During the match
Whatever you start with, go with it. Never tell yourslef you got a bad start, and never tell anyone else that either. Keep tabs on your hand, and play what you can when you can or when you think you should. If you truely have the worst hand you could have, don't show it, chances are really good your opponent could play an N if they think you have a good hand. Also, check your opponents discard often, see how many Catchers, Junipers, Ns, ect. they've used, because then you dont have to worry about guessing if they'll have them later or not, because you'll know.
My playstyle changes, I always react to what my opponent does calmly and accordingly, if my opponent thinks I know what I'm doing (even if I don't) it keeps them on edge. If they misplay, then it's fine with me. Also, surprise KOs can really frustrate any opponent and make them think I can do it again.
-3: Keep Playing
Lots of times when a deck doesn't work for someone, they'll change it. But that isn't always the answer. Lots of times, you just need to get comfortable with the deck or tweak it a bit to make it work better than before. It's important to find what playstyle you're most comfortable with and use decks that match that style, I myself prefer agressive decks, but everyone is different.
3: Playstyles and Deck Types
I like to think of our format being split into 5 different deck types:
Agressive: Includes decks like Terrakion, Darkrai/Tornadus, Landorus decks, and other big basic decks.
Healing/Defensive: Bouffalant, Hydreigon, Klinklang fall into this catagory.
Status: Decks in this catagory use special conditions to mess up the opponents game, Amoongus, Munna, and Raikou EX are in this catagory.
Assistance: These decks use pokemon to get set up, stay set up, and ruin the opponents plan, these include decks like Empoleon, Emboar, Blastoise, or Dusknoir. Hydreigon and Klinklang can also go here, but they are more used for their healing aspect with Max Potion support.
Special: Decks that don't fit in the other catagories go here, such as Mill or Donk decks.
On top of that, there are different play styles for decks:
Agressive: You want to hit for lots of damage early, and keep up the pressure every turn, letting up on damage can be a bad mistake. You shouldn't worry about resources too much, just so long as you can continue KOing your opponent.
Conservitive: This style is very common, using Super Rod or other means of keeping the deck full and cards in your hand.
Special: Everyone is different, so everyone plays differently, no 2 people can play even the same deck the same way.
Sorry for typos, or anything confusing. I'd be happy to answer any other questions latter. I hope this helps somewhat.