That's great advice for trusting the knowledge at the dispensaries. I was quite blown away at the knowledge some of these people have at the dispensaries in this town. If I had to guess, there are over two dozen shops in a town of 40,000 people here. Knowing the difference for sativa and indica is helpful too. Sometimes you can get lucky and find an up to date website to see what's in stock, and by Googling the strains to find out what effects you'd like. I use Leafly quite frequently and rarely buy more than a gram at a time so I can test things out. You may also grind the flower and mix strains to give a hybrid effect (aka weed salad). The hybrid effect essentially is countering other strains' side effects to a more desirable profile.

For a power punch I like mixing Chemo, Ken's OG Kush, and Superglue. Couch locked and every fiber in your body goes fully relaxed allowing me to get motivated and exercise with the release of substance P without the fear of pain.