You could organise an event about things that are important to you.
For example, you could organise a tea party or a sponsored running event to raise money for a group or charity.
You could organise a meeting to bring people together who care about the same things.
You could organise a public meeting and invite your MP along to answer questions people might want to ask.
You could put on a play with a drama group, or make a film that tells people about things that are important. For example, this might be about bullying or the right to have relationships.