When the Leave narrowly win on the 23rd, there is only one sensible option and that is an EEA treaty which includes us staying in the single market. The control of EU immigration will not happen overnight, but we will be able to make our criterion for looking for work eligibility and benefits access tougher than we can at present. The next step beyond this is to join EFTA which unlike the EU is purely a trading block.
With an EEA treaty we will gain:
1. Our law has supremacy over EU law, so we are a sovereign state again.
2. Our supreme court is our highest court not the ECJ.
3. Most standards are global and made by global institutions like WTO, ISO etc. The UK will in effect be promotion by sitting on the top table like Noway in these standard negotiations, which at the moment we delegate to the EU and have to accept what they decide through QMV and any gold plating they QMV add.
4. We can negotiate our own trade deals and this will happen much faster than through the EU as they have to get 28 countries to agree. This is why they have an appalling record with very few trade agreements that have taken an inordinate long time to negotiate, with failure to agree being a very common outcome.
5. CAP, CFP, minimum VAT rates will not apply, nor will the currently being implement common tax rules and rates or the soon to be formed EU-Army (which to French great satisfaction, undermines NATO).
6. It will take a minimum of 2 years to get the EEA deal and probably more like 6 years to unpick 40 years of EU regulation. The EFTA is a global trading block which will further boost our global trade.
7. All these scare
stories fables on how the sky will fall in on the 24th if we vote leave, take with a pinch of salt for the bullsh!t that they are. Norway went through the same with both their EU joining referendums which they rejected and yes it did make a difference they are now one of Europe's richest countries with a massive sovereign wealth fund.
8. Being an EEA member means we pay much less than our current EU fees, saving in the order of £5-7bn.
9. Prof Patrick Minford one of our leading macro-economists has calculated that with reduced EU over regulation that our economy will grow by at least an extra 6% over 10 years. A good measure on how the EU has stunted growth over the last 25 years is that the EU percentage of world trade has fallen twice as fast as it has for the US.
10. So use your vote wisely on the 23rd and if you belong to certain communities, don't forget to vote early and often.

The leaving process is all explained in this FLEXIT video or the 420 page PDF for those, like me, that prefer to read.
https://www.youtube.com/watch?v=GliFMIHiGoghttp://www.eureferendum.com/documents/flexcit.pdfThere is also the "Brexit The Movie" for those that haven't seen it, a bit too MSM for me, where I prefer as dry as cream-crackers style information videos and podcasts, but it does contain some interesting information.
https://www.brexitthemovie.com/There is a wealth of information from both sides using social media (facebook, twitter). This has been especially important for Leave as they have a fraction of the budget of Remain, including the full 'un-biased' reporting by the BBC! The stream of government announcements has now stopped due to 1 month of Purdue, where it is illegal for Government to use the full resources of the civil service (at tax payers expense) which they did up to the 23th of May. Considering that the establishment have had global resources at their disposal I think Leave where they are currently at about 50% polling with momentum on their side have done remarkably well, so far. So much so, that the current rumour in Brussels is to offer further concessions to Cameron as a Leave spoiler 1 week before the referendum and when Leave win don't be further surprised when the [start] EU offer further concessions along with the invitation for another referendum [go to start as many times as necessary until we learn to vote in 'right' way].

We might be the first to Leave but we will probably be joined by at least 4 other countries pretty quickly and maybe more as we aren't the only ones that can see the damage the EU is doing to our political cohesiveness, institutions and especially our economic growth and wealth.