Hearthpwn

Always let it hand:

Forbidden Shaping

Mind Vision 
Power Word: Shield
Northshire Cleric
Museum Curator
Twilight Geomancer

Thoughtsteal (if you already have at least 1 minion)

If you awaiting zoo, let in your hand also one of aoe removal Excavated Evil, Holy Nova, Abomination

1) Strategy againts agrro decks is simple - try to stay alive and enjoy the game :-)

Againts agrro decks, which is most favourite meta around all ranks, because fast climb is good (fast win, or fast lost..) we have also many cards:

3x 2 mana cards: Shadow Word: Pain x2, Twilight Geomancer x1

3x 4 mana cards: Mogu'shan Warden, Forbidden Shaping x2 (againts agrro best usage is for 4 mana - great removals can appears)

4x 5 mana Excavated Evil, Holy Nova x2, Abomination - aoe removals is most disgusted choice againts zoo players, just care use Abomination againts shamans with Hex in hands...

Well, only very very lucky facetards can win before 6th move againts priest. Still we have many others removals options - Mind Vision x2, Thoughtsteal can produce some spell/charge, Museum Curator x2 can produce 3 cheap (under 5) taunts, so this deck really works againts agrro decks.

2) Other decks have simple strategy also...

Just control the board, heal minions, Entomb enemy great minions - always take other Sylvanas Windrunner, and wait for others key win conditions cards like: Ysera, Archmage Antonidas, C'Thun (always don't remember safe one Entomb or Shadow Word: Death for him!), Ragnaros the Firelord, Reno Jackson, Tyrion Fordring, Anub'arak,Emperor Thaurissan (if you can't kill him fast), Elise Starseeker, Confessor Paletress

Remember, You have only 2 Entomb and it add cards into your deck, so then you can use 32 cards which can help during fatitude.

This deck has many win conditions:

Holy Champion - if buffed and not destroyed, its lethal card...
Confessor Paletress - with invisible taunt - always use it for at least 1 inspire...
Ysera - well, its just lottery about card, but its strong (12hp) minion which can win game
Yogg-Saron, Hope's End - well, if you don't have any other option, you can use him earlier with 8-10 spells, but always try to use him, when You have more minions than opponent's battlefield. And use him AFTER you killed enemy Sylvanas Windrunner, because if you killed her during "spells chaos" she can steal your Yogg-Saron, Hope's End and than spells continue for enemy player!

Shadow Word: Death - you have 2 in your deck. So you can use it againts some 5/X cheap minion and still you will have one remains for big one. Or safe both for big minions, but remember, also Entomb here ;-)

Shifting Shade - very good drop for 4 mana - play it as fast as possible
Sylvanas Windrunner - you can combo with Shadow Word: Death for 8 mana to steal one enemy minion

Abomination - remember, that some spells can transform him, especially shaman's Hex, so try to use him smart. Also remember he damage all characters, so also You.

Museum Curator - always select minion which helps you with current match, not which is strongest minion. If you know, that game will be agrro/tempo, take some taunt/removal minion, if you awaiting fatitude war, take some big one.

Confessor Paletress - well, it can produce taunt minion, it also can produce Nozdormu which is 8/8 favourite minion for tablets/phones player, because both players will have only 15 seconds to their rounds. Always count that she don't survive to next round, so use her as "combo" for 9 mana - cast minion + use hero ability.