My best trick:

Apply the stuff as evenly as you can. Then take a tissue and buff areas where the color's likely to collect. From experience, I can tell you:

Elbows (inside and out)
Knees (backs and caps)
Inside of wrist
Where your armpits meet your chest
Tops of toes, possibly between toes, depending how you apply

And I always buff my whole face and neck generally, because I'd rather lose a little color than have some weird streak.