Here are key statistics on the most successful campaigns that you can take away to improve your own chance of success:

Campaign Statistics
Campaigns that are shared fewer than 2 times have a 97% chance of failure
Campaigns that can gain 30% of their goal within the first week are more likely to succeed
The most successful campaigns took an average 11 days preparing for their launch
Campaigns that run for less than 40 days are 6% more likely to reach their goals than campaigns that go longer than 40 days
Campaigns with videos under 5 minutes were 25% more likely to reach their goal than those with videos that were longer
Campaigns that offer perks raise 143% more than those which don’t (for reward / equity campaigns)
The $25 perk is the most frequently claimed. The $100 perk raises the most money and makes up nearly 30% of total funds raised
The average Facebook timeline post has a conversion rate of 3.8%, similar to other social networks, whereas email has an average conversion rate of 25%
Campaigns with teams of more than 4 people, raise almost double that of campaigns with only one person
On Kickstarter, the majority of successful campaigns fall within the $1k to $10k bracket
Campaign owners that update backers every 5 days or less raise around 3x more
Visitors stay on your page 35% longer and are 24% more likely to donate once you’ve raised over 40%. Get your closest friends and family to contribute first
Industry Statistics
Crowdfunding grew to $16.2 billion raised in 2014, 167% up from $6.1 billion in 2013.
In 2015, the industry is predicted to double again and hit $34.4 billion crowdfunded.
North America led crowdfunding volumes ($9.46 billion), Asian came second ($3.4 billion) and Europe followed close behind ($3.26 billion).
Business and entrepreneurship remained the most popular crowdfunding category ($6.7 billion in 2014) which social causes came second with $3.06 billion raised.

Source:
GoGetFunding internal statistics from 2012 to April 2015
IndieGoGo Insights & Talks:
https://go.indiegogo.com/blog/tag/indiegogo-insights
youtube.com/watch?v=3YNLB85UIFA
Kickstarter Statistics:
https://www.kickstarter.com/help/statsFundable statistics:
https://www.fundable.com/crowdfunding101/crowdfunding-statistics
JustGiving insights:
http://blog.justgiving.com/category/insights/
Crowdsourcing.org:
http://www.crowdsourcing.org/editorial/global-crowdfunding-market-to-reach-344b-in-2015-predicts-massolutions-2015cf-industry-report/45376
Crowdcube:

Equity Crowdfunding – what’s the payback for investors?


Growthfunders:
http://blog.growthfunders.com/equity-crowdfunding-whats-in-it-for-investors
Note: As equity crowdfunding is such a young market, some of the calculations are based on traditional equity expected returns.