the more commonly used verbs taking ‘a’ with an infinitive:-

 

The following is a list of the more commonly used verbs taking ‘a’ with an infinitive:-

Abandonarse a	To give oneself up to	Autorizar a	To authorise to
Acostumbrarse a	To get used to	Aventurarse a	To venture to
Animar a	To encourage to	Ayudar a	To help to
Aplicarse a	To apply oneself to	Comprometerse a	To undertake to
Aspirar a	To aspire to	Condenar a	To condemn to
Atreverse a	To dare to	Decidirse a	to decide to
Dedicarse a	To do (career)	Obligar a	To oblige to
Detenerse a	To stop to	Oponerse a	To object to
Disponerse a	To get ready to	Pararse a	To stop to
Enviar a	To send to	Persuadir a	To persuade to
Exponerse a	To expose oneself to	Prepararse a	To prepare to
Forzar a	To force to	Quedarse a	To remain to
Incitar a	To incite to	Reducir a	To reduce to
Inducir a	To induce to	Renunciar a	To renounce
Invitar a	To invite to	Resignarse a	To resign oneself to
Limitarse a	To limit oneself to	Resistirse a	To resist
Llegar a	To succeed in	Resolverse a	To resolve to
Negarse a	To refuse to	Volver a	To do again

more info : www.jwitney.net/notes/docs/spanish/lang/sp_prepositions.doc