Last year we used the dried okra stalks left in the ground as a natural trellis for the new sugar snaps. That method worked up to a point but then the sugar snaps grew too large for the okra stalks to support them. So this year we are trying something else. With some leftover wire fencing and wooden stakes we built a trellis that looks like my drawing (below). To do this, drive the wooden stakes into the ground and then secure the fencing to the stakes either by wrapping the edge of the fence around the end posts or staple or tie it to the stakes.
Most of the stakes we used are T shaped because we then drape a netting over the entire bed to keep out the birds. The house sparrows around here really like to eat the tender leaves.
There's lots of ways to make a trellis. Do you grow sugar snaps? What trellis method do you like?