uLearn.Photography - part of FilmPhotoAcademy.com
Firstly, with all the lenses you might have see how close an object can be so you can still get focus.
If you have any of the macro equipment above, get the best shot you can of:
1) Small coins
2) A piece of fabric
3) The skin of an orange
4) Anything else that takes your fancy.
If you do not have any of the macro equipment, then can you zoom in and crop on your computer to get a fairly large sized image of something small.  Just how far can you go before the picture quality gets too poor?