Aspects made by transit (moving) planets to natal planets are very important in prediction. Tracking your aspects is fairly simple but takes some time to record since there's 9 transit planets (you don't have to do the moon) and 10 natal planets (including the moon). Starting out, you need to only look for the "major" aspects: conjunction, sextile, square, trine, and opposition.

Planetary movement through the houses means when the transit (moving) planets enter a new house in your chart. There are 12 houses in a chart, and they each rule different things, and when a transit planet enters a house, it brings its energy to the areas of life that house rules, making the house more prominent in your life.

"oday we re-examine how Saturn conjuncts the Pluto of everyone on Earth between 2006 and 2014, no small event! The past several years have profoundly impacted those born between 1956 and 1970, and right now everyone born in the 1970s are under heavy pressure involving both Karma and Dharma for the rest of 2010 into 2011.

"Actually, let’s talk for a minute about building a house. Let us say, for the sake of argument that you decide that you want to build your dream home. You probably have some vague ideas about how it will look, about the various features and styles of decor, about the layout.

"Until today, I have not realised just what the influence of the planet Neptune implied or signified. Neptune takes a long time to travel through one sign, and therefore through one house. It has been in my natal 5th house since I was about 12 years old. About the same time that I fell for a blond Canadian girl in school, that I would not stop idealizing and thinking of as truly beautiful, even now, though I am not “in love with her” and haven´t really thought of her since I left school."

An article discussing the transit of Mercury into Sagittarius November 15th 2009 to December 5th 2009.

A discussion on the transit of Venus into Scorpio from 8 Nov to 1 Dec 2009 - it's possibilities with the Sun and Mercury and how the position plays out natally in a chart.
 

"I would hazard a guess though. The 12th house is like a swamp. Any planet that goes wondering off into this house gets its feet full of mud and dirty water. When a planet passes through there it gets tired very easily. In the swamp it is hard to move around, you´d be lucky to walk 100 meters in a day, and even if you did, it might actually be in the entirely wrong direction, or in a circle. Sometimes it´s a matter of realising that all you are doing is running around in circles, and that there is no point really in pursuing such futile objectives.

"In response to a reader query, I’m tackling the issue of Saturn in Libra. The short answer to the question above is that on a world scale, no one knows for sure what Saturn in Libra will bring. The planets are extremely resourceful in bringing issues to our attention that we didn’t know we had. Saturn is especially good at this.

"Much of our daily lives consists of schedules, bustling about, taking things for granted, and not paying much attention to what we’re doing. Except for feelings of vague disgruntlement with how things are going or wistful yearnings for some goal we hope and imagine is just beyond the horizon, we rarely stop to take stock of ourselves, to ask ourselves whether we’re on the right track and doing our best.