Limited v. Constructed 2.0-A Cry for Help

So how's that "Get the ole Constructed rating up" initiative going, CBG? Well I am glad you asked. Since making that resolution, I have participated in one event and gone 0-3. This dropped my rating another 7 points, to a new low of 1511. I really am starting to get a little embarrassed by this. After 3-1'ing my flight at the prerelease, my Limited rating is back up to 1654, only 4 points shy of the 1658 I reached after ambushing Gaudenis Vidugiris for 29 points at the PTQ-KL last year*. I still feel a little bad about that, especially since he won out to make top 8 and I, uh, 4-4'ed. A 143-point spread. Ouch.

So like I said, I am getting a little embarassed, and I am asking for help. What should I play at FNM or SNM to get that Constructed rating back up? Will somebody please test with me? It occurs to me that I play Constructed games like Limited games and that is hurting me. What do I need to do to get better at Constructed? Help me Obi-Wan, you're my only hope!

*Incidentally, Gaudenis was a really nice guy and got horribly mana screwed game 1, and lost to a ridiculous 4 removal spell draw game 2. No disrespect intended or implied.