Some handy advice for self-home decorating. Consider who's going to live there and decorate accordingly.
Consider the climate.
Consider your budget.
Consider the tastes and preference of your other half (if you're married)
Consider the size of the house, and how much free space you want in the end.
Consider how much time you have to work with.
And I might add, consider having your house professionally appraised before decorating or re-decorating, you might save yourself a lot of unneeded stress.
Link: Things to Consider In Decorating a Room (home decoratio