As your makeup repertoire expands over time, there are certain products that have a longer lifespan than others and can become useless after time. While products like tube mascara and liquid eyeliner will probably stay effective for a long time, powder products, bronzer and eye shadow can start to wear out pretty quick. According to Shape.com, there are some handy tips to improve their shelf life and make sure that you can wear them effectively.
As tempting as it may be to go for that dynamic new eyeshadow shade, it may be best to go with a few versatile hues instead. You'd be surprised at the many makeup ensembles you can create by combining certain products, so go for a bunch of adaptable colors instead of trendy products.
Most importantly, you should keep your makeup in a climate controlled environment with adequate humidity. Some cosmetics can dry out faster than others, so be sure to use these first before others to ensure that you're not wasting your money in the long run.
Another tip is to head to a makeup store and ask for a few samples - if you're just trying something out, it's best to go for the free version!