Noob help

In the world of Magic asking general questions doesn't really go that far...I guess the best advice I could possibly give is that in each and every deck you make you should have a clear goal, one way you would like the specific deck to win. Based on that premise you then need to find the card which best fit your budget, mana curve, main goal, and ways to stop other decks which have innate power to stop your deck from winning. One thing to always remember is this; the most expensive card is not always the best. Sometimes games can be won with nothing more than commons and uncommons, this isn't always the case, but for the most part things like tarmogoyf, which are impressive in their own right, are but a simple creatures that can be obliterated at a moments notice. Then there are cards like shimmering efreet, an inexpensive card, which is a turn after turn repeating exile spell that isn't in play for half the time. There are always subtle advantages to be found.

If you have a deck which you actually own I'd like to take a look at them..on the same note I will link you to several decks that I own and win quite consistently. They're in no order for which is strongest...but these are the most winning decks I've made. Feel free to ask questions, make comments, take notes, and even make suggestions if the mood takes you.

http://www.mtgvault.com/granflux/decks/budget-gruul-tactics/

http://www.mtgvault.com/granflux/decks/death-is-but-a-game/

http://www.mtgvault.com/granflux/decks/elfgulfing-slagwurm-run/

http://www.mtgvault.com/granflux/decks/elemental-storm/

http://www.mtgvault.com/granflux/decks/abzan-walkers/

http://www.mtgvault.com/granflux/decks/i-swear-its-just-black/

http://www.mtgvault.com/granflux/decks/grixis-risen-anew/

http://www.mtgvault.com/granflux/decks/budget-blue-aggro/

My newest project is this one. It's not even public yet ;)
http://www.mtgvault.com/granflux/decks/projectenitus/