Keep the trackpad very clean and your palms/fingers as well; especially sweat-free. I can't recall right off the top of my head, but there may be a sensitivity control option under System Preferences to control the sensitivity of the trackpad.
MacBook Pro (15-inch, Mid 2012) 2.3 GHz Core i7, 8GB, 256GB M4 SSD
iPhone 6 - 64GB S/G • Sound System Audio Engine A2 • Display UltraSharp U2412M 24"
Custom Built Gaming PC Skylake Edition | 8GB DDR4 | GTX 970 4G