I have received golfing tips from many places and from many people that I have played with over the years. One resource that seems to provide good consistent tips is Golf Digest Magazine.
I have found the articles to be very informative as they are written/narrated by golf pros themselves. I have used some of them successfully in my own game. There are also "detachable pocket tips" which can be taken on the course for immediate reference when you play. I have recreated some of the tips below which may help your game as well.
The biggest mistake amateurs make on a sand shot is failing to finish the swing. They hit into the sand properly, but just stop, and the ball stays short. The key to getting out of the sand is to make a full follow-through, unless the ball is buried or you have no green to work with.
Good golfers play within their feet. In other words, their weight is on the inside of the back foot on the back-swing and on the inside of the forward foot on the through-swing. At finish, a stable left foot and heel-up right foot are evidence of proper weight distribution. If I keep inside my feet, I can swing as hard as I want and stay in control.
 
Many golfers set up with the driver the way they do with an iron, then hit down on the ball. Instead, learn to sweep the ball off the tee by practicing the correct setup position on an upslope. Place more weight on your right side, with the left hip bumped slightly forward and your spine tilted slightly to the right. Now take this "launch position" to the tee.
Flipping the right hand at the ball at impact-a "hit" move-is a common breakdown of the putting stroke. You'll miss a lot of putts long and right that way. To keep it from happening, slide a pencil into your glove near the Velco flap. Move the hands and the arms as a unit so the pencil point won't jab you in the hand.
For power, you must shift your weight to the right side on your backswing without swaying. It's called "loading" your right side. You should turn your hips some, but keep your weight inside your feet. Seeking more power, many players sway on the backswing or turn their hips too much.
Before every practice session or round on the course, I take a dozen swings using a club with a weighted head. Not only does it help me stretch my golf muscles and get loose, it also makes the regular clubs I'll be using feel light. You can also improve your tempo - the heavy club keeps you from swinging too fast.
Here's the antidote to flubbing short chips. Lean forward so your weight is over the ball of your left foot, then lift your right heel. This helps you hit with a slightly descending stroke. With the ball back in your stance and your hands forward, you're set lup to swing the club from high to low, with the club striking down on the ball crisply and finishing low.