You may be new to home improvement. In such a case the best advice you can remember is to keep your tools functioning well and always put back in a designated spot. To many times enthusiasm can get the best of you on your local projects, or even projects you earn a living from and keep you from taking the extra step to keep your tool new.
Over enthused home improvement caretakers tend to jump into a project, grab the tools they think they'll need, proceed to use their tools recklessly and then not return them to a pre determined area. This careless behavior will cost you more money to replace the tool when its lost, cost you more time to start and finish a project, and cost you untold frustration for having to make an extra trip to the hardware store or when the tool doesn't work right.
The benefit of keeping tools properly maintained and readily available results in quick start to end process on your project while knowing that the tools will behave as new on your next project. Cleaning paint brushes after use and returning them to where you know they are next time is a prime example. With just a little effort you can keep your brush like new for the next job.
Also at the top of the list is keeping tools, especially machinery, maintained. Using fuel stabilizer in winters, oiling and changing oil regularly, and proper use when actually using the tool will give you years of satisfaction and save you time, effort, and money. So keep your tools like new and get on with your project.
Some other advice about tools, at least to save money, is to buy tools second hand either from yard sales or from friends. They must be in good condition or able to be fixed so they are in good condition or you lose out on the functioning of your tool. Bringing second hand tools to like new condition, while getting them cheap or free, is also a rewarding experience as you have reduced expenses considerably and as a result can enjoy the benefit of worrying little about getting the project done. Even borrowed tools can reap the same benefits but make sure they are in as good a condition when you return them as they were when you borrowed them, if not better.
For example I have a new lawn mower which I keep well maintained and put away wisely when not in use. My neighbor, when she moved in next door, did not have a lawn mower so I asked her to borrow mine. She regularly mows her lawn during spring and summer with it as do I. Needless to say the machine gets a lot of use as we both own large yards with many twists and turns.
It has been three years now and the machine still acts as new, starting on the first or second pull, cutting the grass with a still sharp blade, and even the paint is still a bright red. Lesson to be learned, as you might have surmised, is to keep your tools functioning by keeping them put away and well maintained.