Readings & Meanings:
I go up the stone steps of the temple.
Knock first before crossing a stone bridge. (proverb)
I make an offering to the stone statue of Buddha.
Gather the iron filings with a magnet.
No special tricks to remember this one. This one's easy. 5 strokes. You can remember it on its own. 石 is its own radical, and we'll see it in other kanji.
Except, you must remember: don't cross the streams! It's not the same as 右. The sloping line of 石 starts just under the top horizontal line.
石の意志 - stone will.
(The Oyaji-gagu section is just for humor. Do not actually use this Japanese in conversation. You will look like a バカ.)