There's no spirit or enthusiasm for the sex tips in magazines. here's a few of mine;
The hood of a car, on a very dark night in the middle of a heavy rainstorm. The idea being the sensory deprivation forces you to focus on the areas that are touching, makes it more intense.
Polar Bearing. This is an adaptation of the Polar Bear tradition. Sit in a hot sauna and get very hot, then dive in to a nearby snowbank and go at it.
Swing set. Should be fairly self explanatory if you have a good imagination, just be sure the set can take the combined weight.