How to choose the best:
Raspberry

Touch

A plump, firm raspberry is best — and make sure to look out for any raspberries that seem wet or mushy at all.

See

Colors can really vary here, with some varieties going to a very pale white, so color might not be as good of a metric as you'd expect.

Nevertheless, look for a relatively uniform color, and stay away from any that seem especially dull.

Some more details:

How to clean

To clean your berries, dunk them in a big bowl of cold water spiked with a tiny bit of vinegar, and then give them a good swirl, being careful not to crush any. After that, make sure to get them very very dry!

How to store

Keep your berries in the fridge, they'll turn quick if left out!

For longest-life, wash them before you put them away, and make sure that they're absolutely bone-dry first. Moisture is the enemy here.

When it's in season

Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.