How can I make this?

[manutdvn]

Hello,

I want to make poll in my forum but I donot know how to do it. Please tell what I have to do. Look at my attachment, I want to replace that by poll.
Thank you! My version is 3.0.8

One more question:

I dnot understand this in third step in Member visited today hack. Here it is.

Step 3.
This is optional, but will speed up the query if you have a large number of members;
Run the following SQL query;

ALTER TABLE user ADD INDEX (lastactivity)

I dnot know what does this mean. Can you explain for me?