If you would like a chart to help you remember to count Sefirat HaOmer, you can download it from https://shalmon.com/sefira (pick your nusach) and print it out to keep in your siddur or on your fridge. If you go to this page you will also see the current day’s count, with the beracha.
You can also get a Sefirat HaOmer app from Rusty Brick for your smartphone.: