Well you did say better acceleration, not all around performance, nitrous wouldn't be that good from a standstill..
Easy and cheap ways to improve your acceleration is reduce weight overall, but to make sure to balance the car out with weight over the rear wheels..
Relocating the battery for example, or getting a much lighter battery is a good way to reduce weight, getting stickier tires on some lightweight wheels, lighter driveshaft, short throw shifter, learning at what rpms are best to launch at, ect.