The Ultimate Guide to Manual Shooting for Beginning Photographers from Moriah Riona. An in-depth look at the components of manual shooting to get the right exposure and the photo you want. A study of Shutter Speed, Aperture and ISO to help new to intermediate photographers better understand photography and their cameras.
Cleaning your Sensor This article applies to all Nikon-based digital SLR bodies (D1, D1h, D1x, D2h, D2hs, D2x, D2xs, D3, D3s, D3x, D40, D40x, D50, D60, D70, D70s, D80, D90, D100, D200, D300, D300s, D700, D3000, D3100, D5000, D5100, D7000, S1, S2, S3, S5 Pro, 14n, 14nx, and SLR/n). It probably also applies to other DSLRs, as well, but since I don't test them I won't speak to applicability of this information for them.
How to Make the Foreground Blurry With a DSLR Camera