How to Use Twitter (with Cheat Sheet) - wikiHow
This link seems to be of some use! In my own words, well, go to twitter.com.
In the upper top right corner it says "Tweet". Click that, and a box will open that says compose new tweet.
To retweet or favorite a tweet, the favorite is the "star symbol" click that it will add it, the tweet, to your favorites list.
The biggie for most sweeps on twitter is retweet (I think, but I don't enter twitter sweeps).
Go to a page with the sweepstakes you want find the individual tweets, you'll see the star symbol
on the right, and the two arrows symbol on the left under the tweet. To retweet click the two arrows.
To reply is the one arrow click that and type.
This is a really fast how to. I hope it is of some use to you. ANYONE else feel free to add to it as I'm lacking time to type a lot more!
Just hover over the symbols mentioned and what it is will show up,good luck!