Gather the data you want to display
Choose the categories for the x-axis
Choose the values for the y-axis
Label both axes
Decide on a scale for the y-axis
Draw the axes
Mark equal intervals on the x-axis
Mark the scale on the y-axis
Draw bars for each category
Make each bar the same width
Leave equal spacing between bars
Set each bar height according to its value
Add a title to the chart
Add labels or a legend if needed
Check that all bars and labels are clear