Gandhi was creative in the ways his opposed British rule.
First, he rejected British clothing and wore traditional Indian garments that were made by him, or other Indians. If you recall, he was born into a higher caste, but yet he dressed like the lower castes in an effort to personally understand their suffering and increase unity. He encouraged his supporters to do the same.
In order to not pay taxes on clothing, he also spun his own cotton. He could have afforded his own clothing, but he wanted to make a point that the Indians didn't need the British imported clothing
Last, Gandhi fasted, or went without food. These were called "Hunger Strikes." He fasted 17 different times during his life. His longest fast was 21 days.