Good and Cheap Lens for Nikon D90?

I just got a Nikon D90 and I was wondering what lens I should start off with that are affordable. Links will be much appreciated.

The 18-105 that's the kit lens. Perhaps supplement it with a 50mm.

http://amzn.com/...B0031YDLDK
anmd
http://amzn.com/...B00005LEN4

Jeroen is right

Get the 50mm f/1.8 and learn from this.

http://www.illustratedphotography.com/basic-photography

All answers here is right. The 18-105mm kit lens for D90 is a very flexible lens.another cheap favorite is the nifty fifty or the Nikon AF Nikkor 50mm f/1.8 D. Very sharp and cheap prime lens good for portraits and low light. 50mm is just around 100USD while you can get the kitlens packaged with the D90. If are are into a cheaper zoom lens, 18-55mm will also do. Try to invest on these lens first and get an external flash like the SB-600. I love using the 50mm more than the 18-105mm due to its bokeh.

50mm 1.8:
http://shop.nikonusa.com/....213468200

18-55mm:
http://shop.nikonusa.com/....213458300

18-105mm:
http://shop.nikonusa.com/....213459500

I purchased Tamron AF 18-250mm F/3.5-6.3 Di-II LD Aspherical (IF) Macro Zoom Lens with Built In Motor. It has held up through weather, vacations and a toddler. It worked very well with my Nikon D50. I just upgraded to the Nikon D5000 and performs just as good. The only brief problem with the lens was it was not grounding to the body. D5000 would display "no lens attached" when it was mounted properly. This had been due to a very thin and finite slip of lubricant (probably from the mirror assembly) coming in contact with the outer smooth part of the bayonet of the body between the lens. After wiping this off a few times, the lens is again "detected" by the body. This may also be due to the way I was stowing the camera in my bag, cradled with lens pointed down.
I only notice the lens creep when walking with the camera in hand or slung on the shoulder. However, I have yet to notice it while shooting. Images are very sharp through the entire focal range. It's great not to have to change lens in haste to capture the moment. I have been able to capture more great moments on the fly with this awesome lens. Being there ready to fire the shot, and getting it, has been priceless. Changing lenses and I would have missed it.
I highly recommend this wonderful lens from Tamron.

It depends on what you're most interested in photography. Although most lenses can be used for most applications, they generally do best when doing what they're designed for.

The best and cheapest prime lens for a Nikon is the 50mm f1.8 at around £100. Tack sharp, great for portraits & general photography.

If you want more of a walkabout lens, then the 18-105mm or the more expensive 18-200mm would be suitable.

If you want to shoot wide angle, then the Sigma 10-20mm is a good buy.