Just be careful if you do decide to say yes to a telemarketer. Some of those calls are scams. One got me a few months ago.
The caller identified himself as calling from Verizon, my home phone company. He said he wanted to send me a free phone for always paying my bill on time. He wanted my credit card number for the $4 shipping and handling, which I gave him

He said I had also been selected to win a free vacation. He wanted my voice verification for both items, which I gave him.
Never during the conversation did he mention any company name, other than Verizon. And never did he even mention services or prices for any services he might want me to order. When he told me about both free things, I asked him if it was really free, or if I would be charged if I didn't cancel something within a certain time frame. He said there was nothing to cancel, I was not signing up for anything.
Then on my next credit card bill, I had been charged $90 by a company called
eplayers.com. I called eplayers.com (the phone number was on my credit card statement). They said they had my "voice authorization" to charge me, that I had signed up for it! I said no I did not, and they apologized and refunded the money.
Then, the following month, on my Verizon home phone bill, I had a $60 charge from
Global Air/ Wave Communications for a voice mail. (Any company can piggy-back their charges onto your home phone bill, and all they need, according to Verizon, is your name and home phone number!! This is happening a lot now!) I called the company, expecting the same apology and refund. The man there was very rude to me, however. He said he had my "voice authorization" so there would be no refund, never mind that the "voice authorization" was falsified.
If this happens to you, contact your home phone service, and depending on the company, you don't have to pay the fraudulent charges. Also,
always, always report them to the Better Business Bureau. It is easy to do, at
www.bbb.com.
The main thing to watch out for is the "voice authorization," but I would say any time anything is free, just say no! If in doubt because it is from a company you use, say "I will call you right back." Then hang up and call the number you have for that company, such as on your statement, and verify the authenticity of the phone call you received. It's better safe than sorry!