Tell the people important to you that they are. Every day.

...and while you're at it, keep your will and insurance beneficiary designations up-to-date, dammit!

A friend of ours passed away this morning (metastatic cancer, 36 days from diagnosis to dead). He didn't keep his will current, nor his life insurance designations. So now a forgotten girlfriend from 10 years ago stands to inherit the bulk of his estate, and the widow and her kids who he's been looking after for the last two years get nothing. His nieces and nephews get nothing.

Don't be stupid. Tell the people you love that you love them, today. Then call your lawyer/insurance agent and get your ducks lined up.