Good idea to give them a slip of paper with your mob no on it. Perhaps best to pop round and just say hi first and then later to drop the slip of paper. You'll often find then that people will also give you their mob no too - and it is very useful, esp if you don't live there to start with.
When you introduce yourself, do mention that you'll be doing work, but make most of it about introducing yourself and being friendly. There's no need in a first meeting to spell out the intricate details of the plan. You'll get a sense of whether some people would like to be your best friends and some don't really want to know anything about you straig away.
With regards to doing works, it's a fine balance with respecting neighbours and getting on with the job. Absolutely find out if they work at home/have small kids etc and definitely plan for your builders to not start before a decent time or for you or the builders to work after a certain time and not all day at the weekend. At the same time, noise is unavoidable and you don't want to give the neighbours the impression you will avoid all noise or totally fit in around their schedules...... being reasonable about the hours worked and being willing to accommodate the odd specific request is important (ie neighbour says that next Saturday afternoon they would appreciate quiet for a particular event) but you cannot totally schedule everything around them. Some neighbours would have you do this if given a chance, so it's important not to be daft in bending over entirely backwards.
And a gift at the end of the work and possibly something after a particularly noisy phase never goes amiss.
The other thing is making sure your builders know you expect them to clean up each day and ensure anything which blows onto neighbours plot is removed daily. Sometimes you might need to do sweeping etc yourself. But being seen to do this and to be aware of it and willing to do it also goes a long way in showing respect for new neighbours. You can always apologise but don't get into self flagelation over it. You are entitled to do the work and putting up with it is just one of those things. Regular contact and keeping them up to date, rather than nasty surprises makes a big difference. And although texts are easier and very useful a lot of the time, personal face-to-face updates occasionally are good, especially if things are a little strained, because tone can be lost in texts.
If you're being decent and communicating well, you can hold your head up.
Hopefully you'll establish really good neighbourly relationships that last many years. Enjoy the new home.