Also, You will break parts, I don't care how good you are, you're gonna break quite a few, especially LED's I've broken at least 15 of them myself, I've made a few of my creations smoke, I've taken out all the lighting in an entire floor of my house when I accidentally switched the polarity of the wires (positive to negative and negative to positive instead of positive to positive and negative to negative), I've totally fried $100 projects because I goofed, and I'm sure everyone here can tell you they've broken their fare share of parts, and it's always at the final stage, where they're just about to finish, they accidentally get the soldering iron too far from the wiring and melt some of the PCB, they grab the wrong end of a soldering iron and have a weeks worth of healing after they peel the iron off their hand, or they pop a chip, or they cut a wire too short, or they break a case, or crack a board, or short a capacitor and fry everything.
Fret not, it's frustrating, and it may make you want to throw the closest heavy object, but it will happen, no matter how careful you are.
I'd say invest in a few bundle packs, not from radio shack, and especially not capacitors, because I made this mistake and got a bundle pack not too long ago of 100 or so (I need quite a few for my projects), and none were labled, so now I've gotta get a multimeter with a capacitance meter function (which means I'll be shelling out like $80) if I want to use those parts.
I'd say definately get a bundle pack of LED's (You can get 80 in a bundle for $2.49 from Electronics Goldmine, but about 1/8 are bad in the bulk package they recieved, so I'd be careful on this one, or you can get their 50 bundle for the same price, all working) Resistors (These are easy to ID, so no worries about buying any special equipment for these), Switches, and Pushbuttons.
Also I'd look into making your own PCB's just about everyone does it, but some schematics can get really complex, and if they're way over your head there's a few companies out there that'll make them for you, but at a price.
I'd also suggest finding a rack, or tool box, or some storage equipment for all your parts, cause unless you buy them in exact quantities, you're gonna have a lot of left over parts and you don't want to do this *Walk walk walk... crunch...* "Oh so that's where that IC went"
If you need any more info, just ask.