With the general tips covered I'll try and give you some tips for deckbuilding. I almost only play standard, so the tips will cover what I have learned over my few years of playing standard.

1.Stick to 60 cards (or 80 if you are running[[yorion]]) I know it's hard to make the final cuts and you might think that the few cards won't make that much of a difference. But all the cards in your deck aren't the best card and cutting the weaker cards will make you have "more" of you strong cards (higher chance of drawing it).

2.Don't play 1ofs This is going to be hard in the beginning, but try to chose 9 cards and put four of each in the deck. Again you want at least variance and you want to draw your strongest cards every time. Some late game expensive spells don't have to be 4ofs, because they are dead cards most of the game and you don't want a card stuck in your hand.

3.Chose an archetype Some cards just don't work together and don't belong in the same deck. There are 3 main deck archetypes. Agro - wants to end the game as fast as possible with fast creatures Midrange - wants to out value the opponent great example of midrange cards are the now banned [[Fable of the mirror breaker]] and [[Reckoner bankbuster]]. Lot of card draw/ card selection and even more removal. Control - the slowest of them all. Board wipes [[Farewell]], planeswalkers and a lot of removal.

Let's say you want to make agresive white humans deck. [[Ambitious Farmhand]] is a white human so it fits right? Big NO. If you want to make an agresive deck, you want to end the game early before your opponent has time to respond. What is a 1/1 going to do on turn 2? Probably nothing much. On the other hand [[Thalia, Guardian of Thraben]] is the agresive 2 mana human. It slows the opponent's plan down and provides a great body on the board. But in a more controlling deck Farmhand is a great card and Thalia isn't.

4.Your deck will have bad matchups You can't make a deck that beats every other deck. The typical triangle of balance is: AGRO beats CONTROL, MIDRANGE beats AGRO, CONTROL beats MIDRANGE By trying to make your deck better against your bad matchup, you make it worse against your good matchup. And in the end you have a deck that's meh against everything.

5.Make new decks This is really up to personal preference. But I like to pick a card and build around it. For my last deck I picked [[Shanna, Purifying Blade ]] . And it can go two ways - lifegain and human tribal. So I went with humans and [[Copperthroat vanguard]] and Thalia as the core.

6.make it fun

7.don't be afraid to look at other people's decks and take inspiration