Linda in Ohio, you can do it! Try searching on Pinterest for "capsule packing" and you will find endless inspiration. For me, I have found that 12 pieces works for me, no matter the season of destination. I don't include rain wear, beachwear or other specialty clothing (like if you were going to a wedding or scuba diving) Here is what works for me:
3 (or 4) bottoms (combo of pants, jeans, capris, skirts, shorts)
2 "toppers" (cardigan, blazer etc)
6 (or 5) tops (1 is always a button up, which can be worn open as a topper. Combination of sleeveless, short and long sleeves, depending on expected weather. Some are printed, some are plain)
All the tops have to go with all the bottoms and all the toppers. I vary the number of bottoms and tops depending on what we plan to do on the trip. We almost always have a "siesta" late afternoon, during which time I wash out whatever is dirty, shower, and change clothes for the evening. I find I usually have a couple of outfits I consider "evening" clothes but the bulk of stuff is "day time" clothes. The evening clothes are NOT fancy, just a slight step up from the day time clothes. I don't like going out for dinner wearing the same clothes I wore hiking yesterday.
I always use either black or navy as the base colour (since that is what I wear in real non-travel life) with one accent colour - red, coral, turquoise, hot pink. One of my toppers is always a bright colour, the other either dark. I use the Polyvore app to virtually "pack" my bag, and ensure everything matches. Have fun, and remember, no one notices what you are wearing but you! Everyone else it worried about what THEY are wearing!