You can't go wrong with a sample of "Sunshower". The song has been sampled so well I had to post two of my favorite songs that sampled it. Panacea's "Flashback to Stardom" and De La Soul's "Am I Worth You?" Both of those are feel good songs that utilize the sample beautifully. Also check out Ghostface Killah's "Ghost Showers" and Busta Rhymes' "Take It Off", they both use the sample as well.