I had my first internship last summer. As I scheduled interviews and prepared my portfolio, do you want to know my biggest fear and the source of my nervousness?

I had no idea what to wear.

Washington, D.C. is about 90 degrees in the shade come June, and it only intensifies from there, ending in a blaze of glory about the end of August/beginning of September. How ironic that this is also the time when interns descend on D.C., slaving away for the good of their resumes.

I didn’t want to show up sweaty and gross for the interview, and neither did I want to seem underdressed. What a problem!

But it’s not a problem for you. Experience has taught me the “do’s” and “don’ts” of dressing for internships…and interviews…and I’m happy to share my knowledge.

The Stuffy Interview

Working as a government intern? Or at some generic federal outpost? Or a law firm?

Etiquette dictates a more modest, professional attire for jobs or internships in areas such as those. Note, however, that modest and professional does not have to equal boring.

See the clothing above? It’s all from Victoria’s Secret. How illicit of you, young lawyer or government worker, to dress in Victoria’s Secret for a strictly dress-coded career!

But, you can get away with wearing a Victoria’s Secret label when the clothes look as classy as this. The french-cuffed shirt is a perfect staple piece for a more modest work wardrobe. Play up the shirt with interesting cuffs…just don’t leave the top button undone too far. It is supposed to be modest, after all! The pencil skirt above has a great little bow on the back, so although you may look staid from the front, you’ll show off your playful side from the back. The best deal is on the far right, with the skirt suit. Victoria’s Secret has a whole host of suits you can buy for less than $99, so take advantage of that offer. To add a bit of spunk to your suits, wear a brightly colored oxford or a blouse with an unusual ruffle detail.

The Semi-Creative Interview

Some lobbying firms, communication/PR firms and other areas of business have a more lax dress code policy with the vague tag of “business casual.” Many college students make the mistake of thinking business casual means their nicest, unripped pair of jeans and their hooker boots underneath them. That is not business casual.

This is business casual:

Emulate the look of a matching skirt-blazer suit with a pencil skirt and blouse in complimentary styles or colors. I like the look of this summery-chic white skirt from Forever21 (it also comes in black) with the more formal black buttondown.

Although it may be 100 degrees outside, chances are, your office will be pretty chilly. I caught dozens of colds last summer going in and out of a 50-degree building into the sweltering heat, and vice versa. It’s best to dress in linen pants, which are light enough to withstand the heat, but still pants so your legs will be warm in the office. The Gap has some great dress pants in petite and long inseams. This Sashimi jacket from Nordstrom has a business-y look, but still keeps a casual vibe with the taupe color. Wear a simple safari-esque buttondown under your jacket, like this one.

The Uber-Creative Workplace

Fashion internships or a workplace that requires a severe creative bent (think a design firm or video production company) is probably the hardest to dress for. If you show up for your interview in a pantsuit and feel severely overdressed, you know you are in the uber-creative workplace.

You can get away with wearing more daring choices as far as dresses are concerned if you keep the color palette neutral or monochromatic. I’d wear black shoes with both of these dresses. The first, from Forever21, could be dressed up more with a long-sleeved blouse underneath, a jacket on top or a vest with a belt around the waist. The second dress from Twelve by Twelve is more “fashion-y,” and would certainly look good with a cardigan or tights, if you should choose to go a more modest route.

I have to admit: this is my favorite of all the interview choices thus far. I wore outfits very similar to this last summer during my internship. The blouse has short sleeves, which is great for warmer temperatures. The great thing about the blouse, though, is how versatile it is. It would look good under a sweater, blazer, jacket, or even layered over another shirt. This skirt from ASOS is perfectly acceptable business attire, but with a stylish flair that you don’t often see in plain-old pencil skirts. If you tuck the blouse in, you’ll get a look similar to the one in the photo. If you leave it untucked and tie the sash in the back on the skirt, you’ll end up with a completely different–and equally cool–look.

The Only Shoes You’ll Need

You should only need a select pair of shoes to get you through your summer internship. Start with a pair of classic black peeptoes with a fashion-y twist, like these from Victoria’s Secret. Note that I said black, not pink! Also, a pair of black pointy-toe stilettos are a must, as they’ll go with everything from dresses to skirts to trousers. Brown heels are also necessary, as you won’t be able to wear black with everything. On days when you don’t feel like wearing heels, try a pair of classy, Audrey-esque flats. For casual Fridays, or on days where you just want to shake things up, try these navy pumps (I also featured them in this post).

Last, but not least, please do not commute in Crocs or flip-flops. There are plenty of lovely sandals out there that are begging for commuting rights, but I tend to favor these lovely Naturalizer espadrilles. They are comfortable, flat-soled, but have a hint of a platform for a more pulled-together look as you ride the subway in the morning.

Don’t forget a bag!

Easily overlooked, but quite important, is your handbag. When you walk into an interview, your accessories say a lot about you. Try a briefcase, or some version thereof, for a more formal position, but for everything else, a classy tote should be sufficient. Make sure it fits your portfolio or anything else you need to take with you. This one from Urban Outfitters is inexpensive, but fits the bill perfectly.

Good luck!