I'm a bit late on the bandwagon but here goes!
1) But one brush and one pigment each payday to slowly build my collection
2) Don't ever get so carried away with LE Collections again. Be pickier! It may be gorgeous packaging but seriously, if they have the same product in the permanent line and you already have it - is there really a need to buy it again?
3) Go to the MAC Pro store in London and buy (and fill) a 15-slot pallette.
4) Make sure to budget what I want before going into the store. It's so easy to impulse buy and then oops, bye-bye several-hundred-pounds
5) Learn to apply and wear falsies (I wore single ones for one day and one night but the strip type seem much easier to me =/ And I think the placement of the single ones messed up a couple lashes on the outer corner of my left eye, sigh.)
6) Invest GRADUALLY in an assortment of eyeshadow and blush colours, since I don't have anywhere near what I'd need
7) Go through all my old makeup and get rid of the stuff I don't need (if I have MAC eyeshadow in Crystal Avalanche, do I really need that covergirl white eyeshadow I bought eight years ago? I didn't think so)
8) Buy a vanity for my bedroom at the new house or some other form of storage (like a sterilite drawer set or similar)
Wow, mine's a long list ^.^"