What colors are prevailing - tonal or local, warm or cold?
When choosing colours for exterior surfaces, consider the style of the brickwork or masonry of your home along with the colours used on nearby buildings, so as to pick colours that are sympathetic to these surroundings. Colours for fences and sheds should be selected with the same criteria in mind.
If paints have been allowed to stand and hard lumps or skin have formed, the skin or scum should be removed, after which the paint can be stirred and strained through screen wire or through one or two thicknesses of cheesecloth.
Take your time there is no rush. There is nothing wrong with having your project take a couple of weeks.
After the siding of your home is painted you can now start on painting the trim. There are a couple different ways you can go about painting the trim of your house. The first way is to mask off all of the trim so that you can merely spray the trim color on to your house, and the second way is to roll the trim by hand. If you are the only person painting the house I would recommend rolling the trim by hand. The reason being is because it takes a long time to mask off all of the trim on your home compared to just rolling the face of the trim boards. If you have multiple people, it would be faster to have the helpers mask everything off while you start spraying the trim color.
Can you get a good paint job from a low buck paint shop? Yes! Professional paint pros and high dollar restorers may scoff, but it's very possible to get a good looking, long lasting paint job from a discount paint shop like Earl Scheib or Maaco. It's not appropriate for every car. I wouldn't hand them the keys to my Shelby GT500 or '53 Corvette, but for those on a budget it's a very good option. The key to a successful budget paint job is to prep the car yourself. Leave nothing to the shop except actually laying down the paint. (note: For purposes of discussion we'll use a classic Mustang as the example, but this process holds true to really any older car)
If you didn't do all your own body work be sure to get a clear price quote from the shop on how much time and money it will cost them to do the repairs. Remember, this can add up quickly, so if you can do the work yourself it's better on your wallet. Finally, discuss timing. Most high volume shops will want you in and out in a few days.