I have found these chore charts to be very effective with my kids. We use small stickers that you can get in a HUGE book from the dollar store, but I think little stamps or check marks or anything would also work fine. Each week you print out a new chart, you customize it to whatever you want and there are several different character themes for the chart. Good luck and hopefully you can use this:
*the website also has a bunch of other amazing things like crafts for the holidays, educational crafts and worksheets (ex. letter tracing called preschool printing practice), coloring pages, award and certificate templates and much more!