If you are struggling to find the rare resources like gold dust or nectar, you can try this strategy:

Smash rocks or weeds once, but rather than collecting the items that come out, simply look to see what is there. If there's nothing you need, refresh the page. The rock/weed will be back and the items coming from it will be different - this saves you from touring all over the place to find new things to smash, and having to wait for them to reappear.