Listening to positive affirmations

Q: I have a question about something called positive affirmations. 

I pray the five daily prayers and the Sunnah, read the Qur’an, fast, and do a lot of supplication to Allah Ta'ala. But I like to listen to positive affirmations to improve my mood, for example to achieve a certain thing that definitely comes from Allah Ta'ala, so my intention is not shirk. The affirmations do not contain any negatives or against Islam. 

Is this considered polytheism if I still have complete trust in Allah Ta'ala? Is the law of attraction permissible? What is forbidden in subliminal messages? Or in subliminals in general?

Female going to a male naturopath

Q: I am a female and went to a male naturopath and he checked my pulse which I thought he won't and felt really bad about it as a ghair mahram touched me. But now I really need treatment and haven't heard of a female naturopath. Is it okay for me to go to the male and is it fine if he touches my hand to check my pulse?

Working hours left up to the discretion of the employer

Q: Alhamdulillah, I have a job offer, but I am not sure if it is Islamic. 

The working hours are 48 hours per week. I queried as to how many hours per day, I was told it is a 6 day a week job with the amount of hours per day, the timings and the number of shifts per day left up to the discretion of the employer. 

My question is, is this arrangement permissible in Islam? Is it permissible for me to take up this job offer?

Permissibility of "Buy 1 Get 1 Free" deals

Q: I wanted to know the Share'ee ruling on "Buy 1 Get 1 Free" deals that many merchants offer in their stores. 

For example, buy 1 case of water, get 1 free. Or buy 1 cellular line and get 1 free. These are offers that are conditional on a purchase of 1 item at least. They're usually incentives to get the customer to buy them for various reasons (they want to remove the item from their shelves, or it's a sales/marketing strategy, or simply a competitive deal in a free market). Is such a deal permissible for the buyer, or is this considered riba? 

Another type of deal that's similar is buying a certain quantity to get a better deal than buying 1. For example, 1kg of tomatoes is RS 50 but 2 KG is 40 (a savings of RS 10). Is such a deal permissible for the buyer?