My chevy blazer won't start. When I turn ignition it just makes a click sound. Dash lights still come on though. Any tips will help.

Check the voltmeter on the dash, does it show a little over 12 volts with the keyswitch on?
If so you can try removing and cleaning your battery connections. After scraping then to shiny metal, I put mine in a coffee mug full of water and a spoon of baking soda, (Bicarbonate of soda, sodium bicarbonate) and let them fizz until they're clean.
Reconnect and give it a try.

Also, check the battery with a load type tester. AutoZone will do it for free.

Do the dash lights go off when trying to crank??

Tryed baking soda trick and nothing different, took battery in and it's fine. I'm going to try to check the starter tomorrow and see if that's the problem.

Took the starter in and sure enough that was the problem. Bought new starter, and it runs perfect.