Aside from taking care of your sewing machine, using the proper equipment would also help a lot in creating a great output. For example, there are different sizes of needles. These different sizes are appropriate for different kinds of fabrics and sewing jobs. Of course, thicker fabrics like denim or jeans would require thicker needle that those used in sewing blouses. This would definitely help in making you sewing job easier, whether it is by hand or through machine.
Take good care of your equipment. Exposure to dust, lint and dirt can cause your machine to malfunction. You can cover it with cloth or plastic to make sure that they are free of pollutants. Make sure your dressmaking shears and scissors are kept in their plastic containers. Working with blunt equipment can be very troublesome and even dangerous.
Also keep your dressmaking equipments in one place. This would save time when you time from looking stuff all over the place. Your sewing patterns should also be stored in a place where it would not wrinkle and crease. To avoid wrinkling and creasing you can roll your patterns and keep them cardboard rolls. This will keep them crisp and wrinkle-free. In general, keep your workspace clean and organized.
Before you proceed with any kind of project, you would need a definite plan first. Actually, planning is not just something you do in dressmaking, but also for other projects. Before you cut or sew anything, you have to be sure about it.
If you are unsure, you can put it in place first with pins and see if the changes are working to your favour. But do not be too afraid of making mistakes. This would eventually help you to learn the tricks of the trade.