Which probiotics should I take on a daily basis to decrease my constipation?

Probiotic. There are many good products. The ones that work have to survive the stomach acid so the beneficial bacteria can make it alive into the colon area. Looks for brands that say acid resistant or formulated to resist stomach acid. One probiotic that survives stomach juices is theralac (google it). You may try different ones. Be sure to drink lots of water everyday.