Some common materials that require a cutting guide are wood, glass, and metal. Below I will list the more common cutting guides and the best tips for when it comes to using those guides on a regular basis.
The glass is a whole different subject in itself and usually requires some use with kerosene for cutting and a higher level of patience than other materials as it is much more fragile to work with than wood or steel in particular.
These websites offer a good range of types of cutting guides and how to properly use them along with the right tools for the job at hand. Each saw you use will require a different guide if you are not only cutting straight lines. Band saw go great with the use of a level, clamps, and depth adjusters. Circular saws can also use levels, clamps and a straight edge guide along with adjusting the depth. Miter saws are different since you can do more than one type of cut with them and sometimes no level is required, however, you will usually be following a predetermined design for the cut to be made. YouTube is a great resource for tutorials on setting up and break down of such saws listed above along with tutorials for choosing the right guides and proper use of those guides per saw recommendations. The home depot along with lowes offer great tips on their websites and in store for someone looking to speak to an actual person. Keep in mind this is simply the best advice that can be given from the knowledge they have obtained through proper research. All of the sites above are great websites for home projects and great for tips, advice, and tutorials.
Be sure to do your research when looking for the right guide for your projects. Check more than one website. Ask a professional if you are completely unsure on the right tool and guide for the job. Know the material you will be working with for the project. Have a blueprint of some sort, professional or hand-drawn, this will allow for predetermined measurements and you can adjust those accordingly before making your cuts. Whether it is an at-home project or a work project be sure to always measure twice and cut once. This will save you time and money for material costs in the long run. This one little trick will end up minimizing waste of material and ensure you are doing the job right the first time so no second cut will be necessary. Once you have done your research and have your dimensions in place take your project by storm and remember to have fun with it. Try new materials to create your own unique project. Share your knowledge with others.