You made it to part two, new meditator!
The second question new meditators usually ask me is 'What should I think about while I sit there?'
The most important thing to remember, especially for you ultra-disciplined athlete types, is to give yourself compassion. When your mind wanders to worries or begins a mundane to do list don't flog it back into line, gently refocus your attention on your intended object. The point of meditation is awareness not to achieve some sort of spiritual goal on the cushion.
Here is a quick list to get you started.
sitting in the middle of a fire built of your own rage/grief/frustration
scry into a candle
visualize yourself conducting every move of your project, every turn of your ski descent, etc.
focus on the sounds and sensations happening to you while you meditate
conjure a mental soundtrack of your favorite natural white noise
imagine yourself wrapped in the caring attention of a loved one