Earlybird - our church runs at a fair sized deficit every month and we struggle all the time to meet our expenses. We decided not to run a planned giving campaign at the moment because of the current climate but we have taken some steps to encourage more giving.
The first thing that we did was to start printing a summary of income and outgoings in our weekly order of service (just total figures), highlighting the monthly deficit. This brought the situation to people's attention, although only those who actually come to church.
A few months after that, we put an article in the magazine which goes out to every member, whether they attend or not, explaining the situation, the different ways of giving, gift aid and the like. As part of the article we asked if members could prayerfully consider their givings while recognising that mostly people give according to their circumstances and acknowledging that some people may wish to reduce their contribution rather than upping it.
As a finance committee, we definitely encourage giving by standing order because that ensures a regular income which allows the church to plan, most people appreciate this fact anyway. Other people commit to putting a certain amount in their envelope every week, which is also good. What's important is a regular amount coming in.
The steps that we have taken so far have seen an increase in the amount of givings and a reduction in our deficit, so it has been quite successful so far, although there is a long way to go. Most of the success has come through not making people feel pressured to pay a certain amount.
I'm actually dead against tithing because I think that it's unscriptural but I also thing that the idea of it puts people off giving/coming to the church at all. To give back to God is a very great blessing but one that we should enter into freely and without coercion, imo.