hype

To hype is to get yourself or someone else excited about something, especially a product. (verb)

When you anticipate and plan for something a lot and get yourself all excited, this is an example of a situation where you hype yourself up.
When you advertise a product by extolling its virtues and going on and on about how exciting the product is, this is an example of a situation where you hype the product.

Hype is intense promotion or advertising of a product, especially if the advertising contains misleading claims. (noun)

Ads going on and on about the virtues of a product, some of which are overstated, are an example of hype.

See hype in Webster's New World College Dictionary