If you visit the Wizard of Odds site, you can find a free video poker game available in your browser window that includes auto-hold features and warnings when you’re about to make a mistake. This is a free Jacks or Better 9/6 game: http://wizardofodds.com/play/video-poker/. You can even update the pay tables for this game to something other than 9/6 Jacks or Better. For the price, this training program is hard to beat. The game also features a “more games” button which opens up a screen where you can choose from three dozen different games, including the following:
Holding cards based on what you feel is correct or holding based on the flow of the cards are both technically strategies. But the video poker game manufacturers set up pay tables based on the math of the game so the casinos will be sure to make a profit from them. Therefore in order for you to make the most of your video poker playing experience, you need to use a strategy that is based on the same math.
The play is simple:  You're dealt five cards.  You decide which ones to keep by tapping the pictures on the screen or pressing buttons on the console. Then you hit the DRAW button and you get replacement cards for the cards you didn't keep. You win if you wind up with a traditional poker hand like two pair, straight, flush, etc. (We'll explain these below for those new to poker.)  The amount you win per hand depends on the paytable of the machine you're playing.  Here's a sample paytable. 

10. Low pair (two 10s or lower). Most new players keep a single jack or better rather than a low pair, and it's true that keeping that one high card will result in more frequent winning hands. But most of those will be 1-for-1 payoffs for a pair of jacks or better. Keeping the low pair will result in more two-pair, three-of-a-kind, full-house, even four-of-a-kind hands.
You won't get rich from video poker even if a machine pays 100%+.  At a fast 600 hands per hour, and $1.25 per hand ($0.25 x 5 coins), that's $750 wagered per hour.  If you play perfectly (no mistakes) and realize your 0.77% advantage, that's $5.78/hr. on average.  You'll also need several thousand dollars of capital to fund the losses you'll suffer while waiting to hit the royal flush.  Yes, if you were capitalized you could play at higher denominations, except 100%+ machines are rarely found at anything but quarters and below.
So it really pays to hunt out the good machines!  But it's actually pretty easy, because the readers of a website called VPFree2 scout out the best machines and post their locations on the site.  Using that site you can see that you can there are 9/6 Jacks or Better machines on the Strip at Cosmopolitan, New York New York, Riviera, Treasure Island, and others.  And in downtown and off-strip casinos, the good games are more common, and available at lower denominations.