AstronomyLinks
Astronomical Telescope Eyepieces: A Discussion for the Beginner
http://observers.org/beginner/eyepieces.freeman.html
Recommends starting with eyepieces of magnification one-fifth of the telescope aperture, and equal to the telescope aperture. So for the SMIC 220mm telescope, that's about 40mm and 200mm.
Observation planning
http://www.heavens-above.com/
http://www.ar-dec.net/vsa/