There are certain types of make-up products that I would advise splurging on, while for others, going for the deal is definitely recommended! Here's when to dish out the dollars and when to save your bucks:
Foundation and Powder
When done right, foundation and powder make the skin look absolutely flawless without looking like you have anything on. Part of the trick in making foundation work is narrowing in on the right colour and formula for your skin type (see here for tips on how to pinpoint your colour of choice and here for how to choose the right type for your skin). When the skin is perfected, other make-up is just icing on the cake! Glowing and even skin also gives you a more healthy and youthful appearance - and who doesn't need a little of that every now and then?? Foundation and powder are definitely worth the splurge!
Fave foundations: FACE Atelier, MAC Face and Body, Stila, MAC Studio Fix
Fave powders: Vichy Dermablend Loose Powder, MAC Mineralize Skinfinish
The more you shell out on an eyeliner, (usually) the better the quality. I consider eyeliner one of those staple items that transforms my look (i.e. I can't live without it!). For an everyday basic, I think eyeliner is worth the splurge.
Fave eyeliners: Make-up Forever Aqua Eyes eyeliners
Lipstick is another product that can dramatically change your look. You just need to do a double-take of that lady you know who wears red lips all the time, and then look again when her lipstick is gone after lunch. Lipstick adds instant pop to the face and one tube can last you quite a long time. For another staple product that you would apply everyday, you might as well treat yourself - opt for a quality lipstick that is highly pigmented, lasts long and moisturizes all in one!
For a product that should be replaced every 3 months, mascara is definitely one item that you should go for the deal on. There are plenty of great mascaras out there to choose from and the beauty is that you can try them all until you zone in on your fave!
Fave mascaras: L'oreal Voluminous, Cover Girl Lash Blast, Maybelline Great Lash Mascara
Eyebrow Pencil / Eyebrow Kit
You don't need to dish out on an expensive eyebrow kit to achieve your best brows yet! Some of my fave eyebrow pencils come courtesy of Rimmel, available at your local drugstore. You can even make your own "eyebrow kit", by pulling out an angled brush and browsing through the eyeshadows you already own. For dark brown to black hair brows, choose a black brown eyeshadow in a matte texture. For lighter haired brows, choose either a taupe or a hazel colour also in a matte texture. Use the technique described here to perfect the brows.
Fave eye pencils: Rimmel
You would likely spend more on an eyeshadow because you were looking for either a trendy, well-pigmented and creaseproof colour. Highlighting eyeshadow is typically applied to areas that aren't prone to creasing (i.e. atop the browbone) so you don't necessarily have to worry about it being 'crease-proof'. Go for the deal here and instead save those dollars towards higher end eyeshadows in deeper/bolder colours that are long-lasting and crease-resistant.
I haven't met a gloss that I didn't want to touch up after half a day's wear. Even the overly sticky glosses that are meant to be long-lasting still look and feel better on the lips within 3 to 4 hours of a new application. Save on gloss to stock up on different types or to indulge in other make-up products!