Here are my Twitter Tips:

#1. Choose an avatar that incorporates your personality, use an eye catching image that will draw positive attention.
#2. Understand the Twitter culture before you dive in.
#3. Tweet on a regular basis.

According to PC Mag these are the tips they provide for beginners:

Shrink Your URLs
RT = Retweet
Direct Messaging
Use the @ Sign
Search For Your Friends
Categorize Your Tweets for Added Exposure
Share Pictures
Tweet from Your Phone
Pick a Good Desktop Client
Download a Mobile Client

Original post by deucetwo