Add more tips to the tips page (10 tips)
completed by: Anikan
mentors: Matthew Rocklin, Vladimir Perić, Stefan Krastanov, Aaron Meurer, Hector1618
Please see http://code.google.com/p/sympy/issues/detail?id=2806 for full information on this task.
Please read https://github.com/sympy/sympy/wiki/gci-2011-landing before completing any tasks for SymPy.
Additional Note(s): As the tips page grows, try to keep it organized.