Common connective words to be used

PERSONAL OPINIONS
My personal view is that...
It seems to me....
I tend to believe that...
I am one of the opinion that...
In my experience....

GENERALISING
Generally speaking,
On the whole,
Typically,
By and large
Often/ frequently/ sometimes/ usually

EXPLAINING
For example,
For instance,
A good illusion of this is
If we take an example
Evidence for this is provided by
We can see this when
To illustrate

ADDITION
in addition

and 

similarly

likewise 

as well as

besides

furthermore

also 

moreover 

and then

too 

not only ... but even 

besides this/that

CONCLUDING
To summarise
In conclusion
On balance
This is a complex issue with no clear answer

In summary

Lastly

Finally

To sum up

To conclude