At least 3 of my six losses came when I drew nothing but land in the midgame, after I already had plenty. I never had a problem with too little land. This was with 16 land and 1 manalith in a 40 card deck. This is the thing I truly hate about Magic -- you put in all this time learning about the cards, and go to all this effort to construct a deck, and all, and then you win or lose just based on the dumb luck of whether you draw well or not.
I do need to learn better what cards are worth money -- my 3 packs had Redirect, Goblin Chieftain, and Doubling Chant, and I kept all 3 of them because I thought they were valuable. Redirect -- $.75. Doubling Chant -- $.99. Goblin Chieftain -- $1.49. Of course I don't remember what non-rares I passed up to get them, but I'm almost sure there was some creature removal in white, blue, or black. (Yeah, I was playing 3 colors, with the 3 dual lands I was fine for mana.)
Also did some trading. I'm trying to collect Cat creatures to make a tribal EDH deck which will surely be lame, and I picked up some other random stuff that should be fun. But I probably shouldn't have parted so freely with the Alpha basic lands, even though I'll never try to play with them. I got ripped off on one card, turns out a foil Snuff Out is a $10 card, and I traded it as if it were $4. I made a point of checking all the other random foils I have in the binder; they're all under $2. Oh well.