Lessons

  Instrumental sensitivity
Calculation of how much exposure time is needed for a given observation.
Calibration and reduction of images
Removing artifacts and imperfections, alignment, averaging, and tesselation of images.
Deconvolution of images
How to make images a sharper than the seeing allows, and the price one pays for doing so.
Basics of observing
Quick start for learning to operate telescope and caemera
Spectral-line imaging
Challenges in the use of narrow-band spectral-line filters in imaging. See also the H II region long form, below.
Crowded-field stellar photometry
How to decompose the image of a dense stellar cluster into its component stellar images.
Observation of periodically-variable objects
Observing cadence, light curves, and periodograms.
Uncertainties in astronomical observations
How to propagate uncertainties through the calibration and reduction process
Pretty astronomical pictures
With 4 hours and a few tricks in Photoshop, one can make extremely respectable pictures at Mees. With 40-80 hours, APOD quality.  

Other resources

Astronomy 203
Lectures 18 (first three sections) and 19-24 pertain to lesson 1.
  H II regions: the long form
Elaboration on the short form presented in the lesson on spectral-line imaging.