Echoing other posters who say they didn't spend any time on a business plan. I literally jumped staight in at the deep end and worked my arse off for 6 months straight (while also working full time and a single mum to two). I genuinely think the thing that holds so many women back is the tendancy to want to plan everything out. The belief that everything has to be "just so" before you can finally launch. I've done this in the past and it's held me back, by the time everything is good enough you'll launch to no customers and no sales, and lose momentum quite quickly. The buzz of a sale will keep you going in the beginning and believe me, that's when you will need it most. It's incredibly difficult and frustrating at the start when you have so many ideas, so little time and can see others further down the road than you being successful. You NEED those highs to keep you determined and you need to make those mistakes so you learn from them.
If your plan says X, and X isn't working for you, you can stick with it or you can adopt quickly to what is working for you. If you've spent 6 months slaving over plan X it's going to be so much harder to let go of that and change course. I started my business with a very specific product range which related to my business name. Then one day I bought some cheap stock which was similar (but different) on a whim from my supplier to reach minimum order weight and it sat in a box for a good 6 weeks before I got round to selling it. It didn't fit in at all with my branding and ethos but from the day I started it sold like hotcakes. 4 months down the line I've completely moved away from where I started and expanded the range of similar but different products and business is booming.
I guess what I'm saying is you have to roll with the punches at the start. You have to be agile, dynamic, and you have to adapt very quickly if you stumble across something that's working- and also cut your loses if something isn't. Bank accounts, business plans, fancy business cards, perfect logos, mood boards, etc is all just noise and distracting you from the real goal which is starting a business. If you don't have a turnover, you don't have a business.