When you show up for an interview be prepared. Here are some helpful tips on what not to do at an interview. Make sure you have a plan ahead of time before going into interviews. Lets take a look at something you don't want to happen.
To Early/Late - Its never a good thing to be late to an interview that's obvious but showing up to early can also be a bad thing. try to get to the interview about 10-15 minutes before it starts and no earlier. You don't want to look like you have nothing else going on in your life even if that's true.
Career Path Clashes - We are all told to be ambitious and talk confidently about where we would like to see ourselves in the future, though if this happens to be in a bigger, better place above and beyond the realms of this particular post, it may be best to hold back a little.
Cracking Jokes - Actually, this is something that can either make or break an interview as the ideally suited joke that really hits the nail on the head could make all the difference in the world. Unless you are a risk taker, keep the jokes to yourself.
Sucking up - As a rule of thumb, avoid compliments to anything other than your basic first impressions of the business as a whole.
Rehearsing answers - This can be a good thing but if you sound like your entire interview was rehearsed you will not look impressive. Showing this level of predictability and lack of creativity will see the application in the trash before it even had a chance to get off the ground.