Depends on what you want, as there's a lot of options. However, I will share the pens and paper of various kinds I like:
pens:
[0] Pilot Razer Point (Black, very fine point)
[1] Uni-Ball Stick Micro Point (Blue, ball-point but with fluid ink)
[2] BIC Cristal Ballpoint (Black, extremely cheap)
Paper:
[3] TOPS The Legal Pad (white, standard us size, wide ruled)
[4] Staedtler Engineers Notepaper (lightly gridded)
[5] Moleskine Notebooks (Large size, hardcover, gridlines)
[1] - http://www.amazon.com/uni-ball-Stick-Micro-Roller-60151/dp/B...
[2] - http://www.amazon.com/BIC-Cristal-Ballpoint-Pen-Medium/dp/B0...
[3] - http://www.amazon.com/Legal-Inches-Perforated-White-Sheets/d...
[4] - http://www.amazon.com/Staedtler-Translucent-Bond-Pads-100/dp...
[5] - http://www.amazon.com/Moleskine-Classic-Notebook-Squared-Not...