One thing that helped me was putting up a graphing pocket chart in my room with the Weekly Graph listed on top and a bulletin board decorated nearby that listed the question of the week. I then put together a binder of about 20 cute scrapbook paper ideas typed out on the different papers; what is your favorite ______. I knew I wouldn't have time during the year so I worked on it in the summer.
Link to Forsythe County Schools website. Another link I found that has graph a day topics is HERE at Kinderpond.
Then inside the page protector I also have the 5 choices. This year I cut off wrappers of Halloween candy like a Skittles wrapper, a Snickers bar wrapper, etc. Then I place those 5 things (or 5 things listed on red apple cut outs) which I will use for the graphing pocket chart.
HERE. Another thing that helps kids is actually collecting data from a survey. It is really and truly easy and the kids love going around collecting tally marks on kid's favorites in the class. A post I did a while back on how I did class surveys and bar graphs is Surveys and Graphs blogpost HERE. I hope you can do a weekly graph too! It is fun.