I know you mean well, but this is classic terrible advice, based on an incorrect understanding of depression. It's not boredom (cured by white water kayaking). It's not a lack of endorphins (stimulated by biking, etc). It's not stress (-> cannabis). It's not that one just forgot that there's good things in life, and some Alan Watts will snap you out of it.
Stagnation, lack of exercise, and lots of oily/sugar/processed foods - all have a direct impact on everyone's baseline well being.
Cutting out fast food / snacks / soda (substitute fizzy mineral water), and making the effort to do fresh stir fry veggies with some ginger, spice, and coconut oil has been life changing. I no longer feel tired all the time, or get drowsiness after I eat.
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Going for a hike, or cautiously ingesting a small amount of cannabis has done as more to reinvigorate life and eradicate dismal states of despair and bleakness as I could ever imagine.
These are all wonderful things, truly. Highly recommended.
But they're of little use to someone with severe depression planning out their suicide. In fact, "empowerment" can trigger the opposite reaction: it emboldens the person to finally carry out their plans. For this reason, activities that would usually be good signs (e.g., someone starts hitting the gym vigorously after starting new meds) can in fact be warning signs that another suicide attempt is on the horizon.
