The easiest way to support indeterminate or semi-determinate tomatoes is with these tomato spirals.
Instead of being tied to a stake, the plant is allowed to grow into the spiral, which provides a natural support. This is the most popular way to support tomatoes in many European countries and is easier than trying to tie half-mature or fruit-laden plants to wooden stakes. They are also great for beans and cucumbers.
Each powder-coated steel spiral stake is 6' long.