Fiona, how are you getting on with this? Was any of the advice given in this thread useful to you?
One word you will often hear evangelists use is "intentional". Be intentional about evangelism. This is what I mean by that: imagine a non-Christian is on one side of a river and to become a Christian (s)he must get to the other side. There are stepping stones that go from one side to the other. Being intentional is about working out what a person needs to move to the next stepping stone. So, if you have an unsaved friend, how can you move her along on her journey to becoming saved. It could be start by becoming better friends - go see a movie together, or meet for coffee. It could be inviting her to church. It depends where she is on the stepping stones.
Don't feel that you have to evangelise everyone. In my case, I started a new job a year or so ago. Whilst not keeping my faith secret, I didn't go around shouting about it. I didn't even join in the negative discussions down the pub (in my experience this leads to arguments and people becoming more entrenched in their opposition to God). I waited to see who was open to things of God. The first one was an Iraqi Muslim. We've been going out to lunch together for a few weeks and he has let me pray for him and he felt the presence of God as God healed him. Now I'm considering what the next step is for him. Maybe Alpha. I'm not sure yet.
Not everyone is ready for evangelism. Chose your time.
Increase your circle of friends. Become friends with them, then work with those who are ready to hear something of God.
One last thing - pray for them. I have been talking with a single mum for a while now. A few weeks ago I asked her if she wanted to become a Christian and I explained the steps she should take. I said we could do it there and then, she could do it on her own, or we can do it together at another time. It would be me taking her through some version of the sinners prayer. She chose the 3rd option and set a date for 3 days later. Three days later came and she put it off again. I say "ok - there's no pressure", but inside I'm nearly panicking lol So I pray for her and pray for her. I'm beginning to think that she's drifting away from the decision and wonder if I should have apply more pressure - "you might get hit by a bus tomorrow" type pressure.
Last night I got a text from her wishing me well while I'm away at the week end and saying she wants to become a Christian when I get back! Lets hope she isn't hit by a bus - lol I'll be praying for her over the weekend for sure.
This post turned out much longer than planned, but I hope you can get a feel for it rather than listen to theories about church programmes.
I notice you are in the UK. So am I
Blessings,
Mike