Can anyone suggest any good online/pdf exercises that will hone my skills in being able to determine the number of 1H and 13C signals in NMR spectroscopy?

Answers would also be helpful.

Perhaps these will help you get started.

http://wwwchem.uwimona.edu.jm:1104/spectra/nmrintro.html

http://www.chem.uni-potsdam.de/~thomas/modules.php?op=modload&name=PagEd&file=index&page_id=444&newlang=eng

http://www.acdlabs.co.uk/educators/links/lnknmr.html

http://www.xula.edu/chemistry/organic/Notes/16CNMRTable.pdf